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9 <h1 align="center">The XML C parser and toolkit of Gnome</h1>
11 <h1>Note: this is the flat content of the <a href="index.html">web
14 <h1 style="text-align: center">libxml, a.k.a. gnome-xml</h1>
19 style="text-align: right; font-style: italic; font-size: 10pt">"Programming
20 with libxml2 is like the thrilling embrace of an exotic stranger." <a
21 href="http://diveintomark.org/archives/2004/02/18/libxml2">Mark
24 <p>Libxml2 is the XML C parser and toolkit developed for the Gnome project
25 (but usable outside of the Gnome platform), it is free software available
26 under the <a href="http://www.opensource.org/licenses/mit-license.html">MIT
27 License</a>. XML itself is a metalanguage to design markup languages, i.e.
28 text language where semantic and structure are added to the content using
29 extra "markup" information enclosed between angle brackets. HTML is the most
30 well-known markup language. Though the library is written in C <a
31 href="python.html">a variety of language bindings</a> make it available in
32 other environments.</p>
34 <p>Libxml2 is known to be very portable, the library should build and work
35 without serious troubles on a variety of systems (Linux, Unix, Windows,
36 CygWin, MacOS, MacOS X, RISC Os, OS/2, VMS, QNX, MVS, VxWorks, ...)</p>
38 <p>Libxml2 implements a number of existing standards related to markup
41 <li>the XML standard: <a
42 href="http://www.w3.org/TR/REC-xml">http://www.w3.org/TR/REC-xml</a></li>
43 <li>Namespaces in XML: <a
44 href="http://www.w3.org/TR/REC-xml-names/">http://www.w3.org/TR/REC-xml-names/</a></li>
46 href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a></li>
47 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc2396.txt">RFC 2396</a> :
48 Uniform Resource Identifiers <a
49 href="http://www.ietf.org/rfc/rfc2396.txt">http://www.ietf.org/rfc/rfc2396.txt</a></li>
50 <li>XML Path Language (XPath) 1.0: <a
51 href="http://www.w3.org/TR/xpath">http://www.w3.org/TR/xpath</a></li>
53 href="http://www.w3.org/TR/html401/">http://www.w3.org/TR/html401/</a></li>
54 <li>XML Pointer Language (XPointer) Version 1.0: <a
55 href="http://www.w3.org/TR/xptr">http://www.w3.org/TR/xptr</a></li>
56 <li>XML Inclusions (XInclude) Version 1.0: <a
57 href="http://www.w3.org/TR/xinclude/">http://www.w3.org/TR/xinclude/</a></li>
58 <li>ISO-8859-x encodings, as well as <a
59 href="http://www.cis.ohio-state.edu/rfc/rfc2044.txt">rfc2044</a> [UTF-8]
60 and <a href="http://www.cis.ohio-state.edu/rfc/rfc2781.txt">rfc2781</a>
61 [UTF-16] Unicode encodings, and more if using iconv support</li>
62 <li>part of SGML Open Technical Resolution TR9401:1997</li>
63 <li>XML Catalogs Working Draft 06 August 2001: <a
64 href="http://www.oasis-open.org/committees/entity/spec-2001-08-06.html">http://www.oasis-open.org/committees/entity/spec-2001-08-06.html</a></li>
65 <li>Canonical XML Version 1.0: <a
66 href="http://www.w3.org/TR/xml-c14n">http://www.w3.org/TR/xml-c14n</a>
67 and the Exclusive XML Canonicalization CR draft <a
68 href="http://www.w3.org/TR/xml-exc-c14n">http://www.w3.org/TR/xml-exc-c14n</a></li>
69 <li>Relax NG, ISO/IEC 19757-2:2003, <a
70 href="http://www.oasis-open.org/committees/relax-ng/spec-20011203.html">http://www.oasis-open.org/committees/relax-ng/spec-20011203.html</a></li>
71 <li>W3C XML Schemas Part 2: Datatypes <a
72 href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/">REC 02 May
74 <li>W3C <a href="http://www.w3.org/TR/xml-id/">xml:id</a> Working Draft 7
78 <p>In most cases libxml2 tries to implement the specifications in a
79 relatively strictly compliant way. As of release 2.4.16, libxml2 passed all
80 1800+ tests from the <a
81 href="http://www.oasis-open.org/committees/xml-conformance/">OASIS XML Tests
84 <p>To some extent libxml2 provides support for the following additional
85 specifications but doesn't claim to implement them completely:</p>
87 <li>Document Object Model (DOM) <a
88 href="http://www.w3.org/TR/DOM-Level-2-Core/">http://www.w3.org/TR/DOM-Level-2-Core/</a>
89 the document model, but it doesn't implement the API itself, gdome2 does
90 this on top of libxml2</li>
91 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc959.txt">RFC 959</a> :
92 libxml2 implements a basic FTP client code</li>
93 <li><a href="http://www.cis.ohio-state.edu/rfc/rfc1945.txt">RFC 1945</a> :
94 HTTP/1.0, again a basic HTTP client code</li>
95 <li>SAX: a SAX2 like interface and a minimal SAX1 implementation compatible
96 with early expat versions</li>
99 <p>A partial implementation of <a
100 href="http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/">XML Schemas Part
101 1: Structure</a> is being worked on but it would be far too early to make any
102 conformance statement about it at the moment.</p>
104 <p>Separate documents:</p>
106 <li><a href="http://xmlsoft.org/XSLT/">the libxslt page</a> providing an
107 implementation of XSLT 1.0 and common extensions like EXSLT for
109 <li><a href="http://gdome2.cs.unibo.it/">the gdome2 page</a>
110 : a standard DOM2 implementation for libxml2</li>
111 <li><a href="http://www.aleksey.com/xmlsec/">the XMLSec page</a>: an
112 implementation of <a href="http://www.w3.org/TR/xmldsig-core/">W3C XML
113 Digital Signature</a> for libxml2</li>
114 <li>also check the related links section for more related and active
117 <p> Hosting sponsored by <a href="http://www.aoemedia.de/opensource-cms.html"
118 >Open Source CMS services</a> from AOE media.</p>
120 <p>Logo designed by <a href="mailto:liyanage@access.ch">Marc Liyanage</a>.</p>
122 <h2><a name="Introducti">Introduction</a></h2>
124 <p>This document describes libxml, the <a
125 href="http://www.w3.org/XML/">XML</a> C parser and toolkit developed for the
126 <a href="http://www.gnome.org/">Gnome</a> project. <a
127 href="http://www.w3.org/XML/">XML is a standard</a> for building tag-based
128 structured documents/data.</p>
130 <p>Here are some key points about libxml:</p>
132 <li>Libxml2 exports Push (progressive) and Pull (blocking) type parser
133 interfaces for both XML and HTML.</li>
134 <li>Libxml2 can do DTD validation at parse time, using a parsed document
135 instance, or with an arbitrary DTD.</li>
136 <li>Libxml2 includes complete <a
137 href="http://www.w3.org/TR/xpath">XPath</a>, <a
138 href="http://www.w3.org/TR/xptr">XPointer</a> and <a
139 href="http://www.w3.org/TR/xinclude">XInclude</a> implementations.</li>
140 <li>It is written in plain C, making as few assumptions as possible, and
141 sticking closely to ANSI C/POSIX for easy embedding. Works on
142 Linux/Unix/Windows, ported to a number of other platforms.</li>
143 <li>Basic support for HTTP and FTP client allowing applications to fetch
144 remote resources.</li>
145 <li>The design is modular, most of the extensions can be compiled out.</li>
146 <li>The internal document representation is as close as possible to the <a
147 href="http://www.w3.org/DOM/">DOM</a> interfaces.</li>
148 <li>Libxml2 also has a <a
149 href="http://www.megginson.com/SAX/index.html">SAX like interface</a>;
150 the interface is designed to be compatible with <a
151 href="http://www.jclark.com/xml/expat.html">Expat</a>.</li>
152 <li>This library is released under the <a
153 href="http://www.opensource.org/licenses/mit-license.html">MIT
154 License</a>. See the Copyright file in the distribution for the precise
158 <p>Warning: unless you are forced to because your application links with a
159 Gnome-1.X library requiring it, <strong><span
160 style="background-color: #FF0000">Do Not Use libxml1</span></strong>, use
163 <h2><a name="FAQ">FAQ</a></h2>
165 <p>Table of Contents:</p>
167 <li><a href="FAQ.html#License">License(s)</a></li>
168 <li><a href="FAQ.html#Installati">Installation</a></li>
169 <li><a href="FAQ.html#Compilatio">Compilation</a></li>
170 <li><a href="FAQ.html#Developer">Developer corner</a></li>
173 <h3><a name="License">License</a>(s)</h3>
175 <li><em>Licensing Terms for libxml</em>
176 <p>libxml2 is released under the <a
177 href="http://www.opensource.org/licenses/mit-license.html">MIT
178 License</a>; see the file Copyright in the distribution for the precise
181 <li><em>Can I embed libxml2 in a proprietary application ?</em>
182 <p>Yes. The MIT License allows you to keep proprietary the changes you
183 made to libxml, but it would be graceful to send-back bug fixes and
184 improvements as patches for possible incorporation in the main
185 development tree.</p>
189 <h3><a name="Installati">Installation</a></h3>
191 <li><strong><span style="background-color: #FF0000">Do Not Use
192 libxml1</span></strong>, use libxml2</li>
194 <li><em>Where can I get libxml</em> ?
195 <p>The original distribution comes from <a
196 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> or <a
197 href="ftp://ftp.gnome.org/pub/GNOME/sources/libxml2/2.6/">gnome.org</a></p>
198 <p>Most Linux and BSD distributions include libxml, this is probably the
199 safer way for end-users to use libxml.</p>
200 <p>David Doolin provides precompiled Windows versions at <a
201 href="http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/ ">http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/</a></p>
204 <li><em>I see libxml and libxml2 releases, which one should I install ?</em>
206 <li>If you are not constrained by backward compatibility issues with
207 existing applications, install libxml2 only</li>
208 <li>If you are not doing development, you can safely install both.
209 Usually the packages <a
210 href="http://rpmfind.net/linux/RPM/libxml.html">libxml</a> and <a
211 href="http://rpmfind.net/linux/RPM/libxml2.html">libxml2</a> are
212 compatible (this is not the case for development packages).</li>
213 <li>If you are a developer and your system provides separate packaging
214 for shared libraries and the development components, it is possible
215 to install libxml and libxml2, and also <a
216 href="http://rpmfind.net/linux/RPM/libxml-devel.html">libxml-devel</a>
218 href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml2-devel</a>
219 too for libxml2 >= 2.3.0</li>
220 <li>If you are developing a new application, please develop against
224 <li><em>I can't install the libxml package, it conflicts with libxml0</em>
225 <p>You probably have an old libxml0 package used to provide the shared
226 library for libxml.so.0, you can probably safely remove it. The libxml
227 packages provided on <a
228 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> provide
231 <li><em>I can't install the libxml(2) RPM package due to failed
233 <p>The most generic solution is to re-fetch the latest src.rpm , and
234 rebuild it locally with</p>
235 <p><code>rpm --rebuild libxml(2)-xxx.src.rpm</code>.</p>
236 <p>If everything goes well it will generate two binary rpm packages (one
237 providing the shared libs and xmllint, and the other one, the -devel
238 package, providing includes, static libraries and scripts needed to build
239 applications with libxml(2)) that you can install locally.</p>
243 <h3><a name="Compilatio">Compilation</a></h3>
245 <li><em>What is the process to compile libxml2 ?</em>
246 <p>As most UNIX libraries libxml2 follows the "standard":</p>
247 <p><code>gunzip -c xxx.tar.gz | tar xvf -</code></p>
248 <p><code>cd libxml-xxxx</code></p>
249 <p><code>./configure --help</code></p>
250 <p>to see the options, then the compilation/installation proper</p>
251 <p><code>./configure [possible options]</code></p>
252 <p><code>make</code></p>
253 <p><code>make install</code></p>
254 <p>At that point you may have to rerun ldconfig or a similar utility to
255 update your list of installed shared libs.</p>
257 <li><em>What other libraries are needed to compile/install libxml2 ?</em>
258 <p>Libxml2 does not require any other library, the normal C ANSI API
259 should be sufficient (please report any violation to this rule you may
261 <p>However if found at configuration time libxml2 will detect and use the
264 <li><a href="http://www.info-zip.org/pub/infozip/zlib/">libz</a> : a
265 highly portable and available widely compression library.</li>
266 <li>iconv: a powerful character encoding conversion library. It is
267 included by default in recent glibc libraries, so it doesn't need to
268 be installed specifically on Linux. It now seems a <a
269 href="http://www.opennc.org/onlinepubs/7908799/xsh/iconv.html">part
270 of the official UNIX</a> specification. Here is one <a
271 href="http://www.gnu.org/software/libiconv/">implementation of the
272 library</a> which source can be found <a
273 href="ftp://ftp.ilog.fr/pub/Users/haible/gnu/">here</a>.</li>
277 <li><em>Make check fails on some platforms</em>
278 <p>Sometimes the regression tests' results don't completely match the
279 value produced by the parser, and the makefile uses diff to print the
280 delta. On some platforms the diff return breaks the compilation process;
281 if the diff is small this is probably not a serious problem.</p>
282 <p>Sometimes (especially on Solaris) make checks fail due to limitations
283 in make. Try using GNU-make instead.</p>
285 <li><em>I use the SVN version and there is no configure script</em>
286 <p>The configure script (and other Makefiles) are generated. Use the
287 autogen.sh script to regenerate the configure script and Makefiles,
289 <p><code>./autogen.sh --prefix=/usr --disable-shared</code></p>
291 <li><em>I have troubles when running make tests with gcc-3.0</em>
292 <p>It seems the initial release of gcc-3.0 has a problem with the
293 optimizer which miscompiles the URI module. Please use another
298 <h3><a name="Developer">Developer</a> corner</h3>
300 <li><em>Troubles compiling or linking programs using libxml2</em>
301 <p>Usually the problem comes from the fact that the compiler doesn't get
302 the right compilation or linking flags. There is a small shell script
303 <code>xml2-config</code> which is installed as part of libxml2 usual
304 install process which provides those flags. Use</p>
305 <p><code>xml2-config --cflags</code></p>
306 <p>to get the compilation flags and</p>
307 <p><code>xml2-config --libs</code></p>
308 <p>to get the linker flags. Usually this is done directly from the
310 <p><code>CFLAGS=`xml2-config --cflags`</code></p>
311 <p><code>LIBS=`xml2-config --libs`</code></p>
313 <li><em>I want to install my own copy of libxml2 in my home directory and
314 link my programs against it, but it doesn't work</em>
315 <p>There are many different ways to accomplish this. Here is one way to
316 do this under Linux. Suppose your home directory is <code>/home/user.
319 <li>Create a subdirectory, let's call it <code>myxml</code></li>
320 <li>unpack the libxml2 distribution into that subdirectory</li>
321 <li>chdir into the unpacked distribution
322 (<code>/home/user/myxml/libxml2 </code>)</li>
323 <li>configure the library using the "<code>--prefix</code>" switch,
324 specifying an installation subdirectory in
325 <code>/home/user/myxml</code>, e.g.
326 <p><code>./configure --prefix /home/user/myxml/xmlinst</code> {other
327 configuration options}</p>
329 <li>now run <code>make</code> followed by <code>make install</code></li>
330 <li>At this point, the installation subdirectory contains the complete
331 "private" include files, library files and binary program files (e.g.
333 <p><code>/home/user/myxml/xmlinst/lib,
334 /home/user/myxml/xmlinst/include </code> and <code>
335 /home/user/myxml/xmlinst/bin</code></p>
337 <li>In order to use this "private" library, you should first add it to
338 the beginning of your default PATH (so that your own private program
339 files such as xmllint will be used instead of the normal system
340 ones). To do this, the Bash command would be
341 <p><code>export PATH=/home/user/myxml/xmlinst/bin:$PATH</code></p>
343 <li>Now suppose you have a program <code>test1.c</code> that you would
344 like to compile with your "private" library. Simply compile it using
346 <p><code>gcc `xml2-config --cflags --libs` -o test test.c</code></p>
347 Note that, because your PATH has been set with <code>
348 /home/user/myxml/xmlinst/bin</code> at the beginning, the xml2-config
349 program which you just installed will be used instead of the system
350 default one, and this will <em>automatically</em> get the correct
351 libraries linked with your program.</li>
356 <li><em>xmlDocDump() generates output on one line.</em>
357 <p>Libxml2 will not <strong>invent</strong> spaces in the content of a
358 document since <strong>all spaces in the content of a document are
359 significant</strong>. If you build a tree from the API and want
362 <li>the correct way is to generate those yourself too.</li>
363 <li>the dangerous way is to ask libxml2 to add those blanks to your
364 content <strong>modifying the content of your document in the
365 process</strong>. The result may not be what you expect. There is
366 <strong>NO</strong> way to guarantee that such a modification won't
367 affect other parts of the content of your document. See <a
368 href="http://xmlsoft.org/html/libxml-parser.html#xmlKeepBlanksDefault">xmlKeepBlanksDefault
370 href="http://xmlsoft.org/html/libxml-tree.html#xmlSaveFormatFile">xmlSaveFormatFile
375 <li><em>Extra nodes in the document:</em>
376 <p><em>For an XML file as below:</em></p>
377 <pre><?xml version="1.0"?>
378 <PLAN xmlns="http://www.argus.ca/autotest/1.0/">
379 <NODE CommFlag="0"/>
380 <NODE CommFlag="1"/>
382 <p><em>after parsing it with the function
383 pxmlDoc=xmlParseFile(...);</em></p>
384 <p><em>I want to the get the content of the first node (node with the
385 CommFlag="0")</em></p>
386 <p><em>so I did it as following;</em></p>
387 <pre>xmlNodePtr pnode;
388 pnode=pxmlDoc->children->children;</pre>
389 <p><em>but it does not work. If I change it to</em></p>
390 <pre>pnode=pxmlDoc->children->children->next;</pre>
391 <p><em>then it works. Can someone explain it to me.</em></p>
393 <p>In XML all characters in the content of the document are significant
394 <strong>including blanks and formatting line breaks</strong>.</p>
395 <p>The extra nodes you are wondering about are just that, text nodes with
396 the formatting spaces which are part of the document but that people tend
397 to forget. There is a function <a
398 href="http://xmlsoft.org/html/libxml-parser.html">xmlKeepBlanksDefault
399 ()</a> to remove those at parse time, but that's an heuristic, and its
400 use should be limited to cases where you are certain there is no
401 mixed-content in the document.</p>
403 <li><em>I get compilation errors of existing code like when accessing
404 <strong>root</strong> or <strong>child fields</strong> of nodes.</em>
405 <p>You are compiling code developed for libxml version 1 and using a
406 libxml2 development environment. Either switch back to libxml v1 devel or
407 even better fix the code to compile with libxml2 (or both) by <a
408 href="upgrade.html">following the instructions</a>.</p>
410 <li><em>I get compilation errors about non existing
411 <strong>xmlRootNode</strong> or <strong>xmlChildrenNode</strong>
413 <p>The source code you are using has been <a
414 href="upgrade.html">upgraded</a> to be able to compile with both libxml
415 and libxml2, but you need to install a more recent version:
416 libxml(-devel) >= 1.8.8 or libxml2(-devel) >= 2.1.0</p>
418 <li><em>Random crashes in threaded applications</em>
419 <p>Read and follow all advices on the <a href="threads.html">thread
420 safety</a> page, and make 100% sure you never call xmlCleanupParser()
421 while the library or an XML document might still be in use by another
424 <li><em>The example provided in the web page does not compile.</em>
425 <p>It's hard to maintain the documentation in sync with the code
426 <grin/> ...</p>
427 <p>Check the previous points 1/ and 2/ raised before, and please send
430 <li><em>Where can I get more examples and information than provided on the
432 <p>Ideally a libxml2 book would be nice. I have no such plan ... But you
435 <li>check more deeply the <a href="html/libxml-lib.html">existing
436 generated doc</a></li>
437 <li>have a look at <a href="examples/index.html">the set of
439 <li>look for examples of use for libxml2 function using the Gnome code
440 or by asking on Google.</li>
442 href="http://svn.gnome.org/viewvc/libxml2/trunk/">Browse
443 the libxml2 source</a> , I try to write code as clean and documented
444 as possible, so looking at it may be helpful. In particular the code
445 of <a href="http://svn.gnome.org/viewvc/libxml2/trunk/xmllint.c?view=markup">xmllint.c</a> and of the various testXXX.c test programs should
446 provide good examples of how to do things with the library.</li>
450 <li><em>What about C++ ?</em>
451 <p>libxml2 is written in pure C in order to allow easy reuse on a number
452 of platforms, including embedded systems. I don't intend to convert to
454 <p>There is however a C++ wrapper which may fulfill your needs:</p>
456 <li>by Ari Johnson <ari@btigate.com>:
458 href="http://libxmlplusplus.sourceforge.net/">http://libxmlplusplus.sourceforge.net/</a></p>
460 href="http://sourceforge.net/project/showfiles.php?group_id=12999">http://sourceforge.net/project/showfiles.php?group_id=12999</a></p>
464 <li><em>How to validate a document a posteriori ?</em>
465 <p>It is possible to validate documents which had not been validated at
466 initial parsing time or documents which have been built from scratch
467 using the API. Use the <a
468 href="http://xmlsoft.org/html/libxml-valid.html#xmlValidateDtd">xmlValidateDtd()</a>
469 function. It is also possible to simply add a DTD to an existing
471 <pre>xmlDocPtr doc; /* your existing document */
472 xmlDtdPtr dtd = xmlParseDTD(NULL, filename_of_dtd); /* parse the DTD */
474 dtd->name = xmlStrDup((xmlChar*)"root_name"); /* use the given root */
476 doc->intSubset = dtd;
477 if (doc->children == NULL) xmlAddChild((xmlNodePtr)doc, (xmlNodePtr)dtd);
478 else xmlAddPrevSibling(doc->children, (xmlNodePtr)dtd);
481 <li><em>So what is this funky "xmlChar" used all the time?</em>
482 <p>It is a null terminated sequence of utf-8 characters. And only utf-8!
483 You need to convert strings encoded in different ways to utf-8 before
484 passing them to the API. This can be accomplished with the iconv library
492 <h2><a name="Documentat">Developer Menu</a></h2>
494 <p>There are several on-line resources related to using libxml:</p>
496 <li>Use the <a href="search.php">search engine</a> to look up
498 <li>Check the <a href="FAQ.html">FAQ.</a></li>
499 <li>Check the <a href="http://xmlsoft.org/html/libxml-lib.html">extensive
500 documentation</a> automatically extracted from code comments.</li>
501 <li>Look at the documentation about <a href="encoding.html">libxml
502 internationalization support</a>.</li>
503 <li>This page provides a global overview and <a href="example.html">some
504 examples</a> on how to use libxml.</li>
505 <li><a href="examples/index.html">Code examples</a></li>
506 <li>John Fleck's libxml2 tutorial: <a href="tutorial/index.html">html</a>
507 or <a href="tutorial/xmltutorial.pdf">pdf</a>.</li>
508 <li>If you need to parse large files, check the <a
509 href="xmlreader.html">xmlReader</a> API tutorial</li>
510 <li><a href="mailto:james@daa.com.au">James Henstridge</a> wrote <a
511 href="http://www.jamesh.id.au/articles/libxml-sax/libxml-sax.html">some nice
512 documentation</a> explaining how to use the libxml SAX interface.</li>
513 <li>George Lebl wrote <a
514 href="http://www-106.ibm.com/developerworks/library/l-gnome3/">an article
515 for IBM developerWorks</a> about using libxml.</li>
516 <li>Check <a href="http://svn.gnome.org/viewvc/libxml2/trunk/TODO?view=markup">the TODO
518 <li>Read the <a href="upgrade.html">1.x to 2.x upgrade path</a>
519 description. If you are starting a new project using libxml you should
520 really use the 2.x version.</li>
521 <li>And don't forget to look at the <a
522 href="http://mail.gnome.org/archives/xml/">mailing-list archive</a>.</li>
525 <h2><a name="Reporting">Reporting bugs and getting help</a></h2>
527 <p>Well, bugs or missing features are always possible, and I will make a
528 point of fixing them in a timely fashion. The best way to report a bug is to
529 use the <a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Gnome
530 bug tracking database</a> (make sure to use the "libxml2" module name). I
531 look at reports there regularly and it's good to have a reminder when a bug
532 is still open. Be sure to specify that the bug is for the package libxml2.</p>
534 <p>For small problems you can try to get help on IRC, the #xml channel on
535 irc.gnome.org (port 6667) usually has a few people subscribed which may help
536 (but there is no guarantee and if a real issue is raised it should go on the
537 mailing-list for archival).</p>
539 <p>There is also a mailing-list <a
540 href="mailto:xml@gnome.org">xml@gnome.org</a> for libxml, with an <a
541 href="http://mail.gnome.org/archives/xml/">on-line archive</a> (<a
542 href="http://xmlsoft.org/messages">old</a>). To subscribe to this list,
544 href="http://mail.gnome.org/mailman/listinfo/xml">associated Web</a> page and
545 follow the instructions. <strong>Do not send code, I won't debug it</strong>
546 (but patches are really appreciated!).</p>
548 <p>Please note that with the current amount of virus and SPAM, sending mail
549 to the list without being subscribed won't work. There is *far too many
550 bounces* (in the order of a thousand a day !) I cannot approve them manually
551 anymore. If your mail to the list bounced waiting for administrator approval,
552 it is LOST ! Repost it and fix the problem triggering the error. Also please
553 note that <span style="color: #FF0000; background-color: #FFFFFF">emails with
554 a legal warning asking to not copy or redistribute freely the information
555 they contain</span> are <strong>NOT</strong> acceptable for the mailing-list,
556 such mail will as much as possible be discarded automatically, and are less
557 likely to be answered if they made it to the list, <strong>DO NOT</strong>
558 post to the list from an email address where such legal requirements are
559 automatically added, get private paying support if you can't share
562 <p>Check the following <strong><span style="color: #FF0000">before
563 posting</span></strong>:</p>
565 <li>Read the <a href="FAQ.html">FAQ</a> and <a href="search.php">use the
566 search engine</a> to get information related to your problem.</li>
567 <li>Make sure you are <a href="ftp://xmlsoft.org/libxml2/">using a recent
568 version</a>, and that the problem still shows up in a recent version.</li>
569 <li>Check the <a href="http://mail.gnome.org/archives/xml/">list
570 archives</a> to see if the problem was reported already. In this case
571 there is probably a fix available, similarly check the <a
572 href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">registered
574 <li>Make sure you can reproduce the bug with xmllint or one of the test
575 programs found in source in the distribution.</li>
576 <li>Please send the command showing the error as well as the input (as an
580 <p>Then send the bug with associated information to reproduce it to the <a
581 href="mailto:xml@gnome.org">xml@gnome.org</a> list; if it's really libxml
582 related I will approve it. Please do not send mail to me directly, it makes
583 things really hard to track and in some cases I am not the best person to
584 answer a given question, ask on the list.</p>
586 <p>To <span style="color: #E50000">be really clear about support</span>:</p>
588 <li>Support or help <span style="color: #E50000">requests MUST be sent to
589 the list or on bugzilla</span> in case of problems, so that the Question
590 and Answers can be shared publicly. Failing to do so carries the implicit
591 message "I want free support but I don't want to share the benefits with
592 others" and is not welcome. I will automatically Carbon-Copy the
593 xml@gnome.org mailing list for any technical reply made about libxml2 or
595 <li>There is <span style="color: #E50000">no guarantee of support</span>. If
596 your question remains unanswered after a week, repost it, making sure you
597 gave all the detail needed and the information requested.</li>
598 <li>Failing to provide information as requested or double checking first
599 for prior feedback also carries the implicit message "the time of the
600 library maintainers is less valuable than my time" and might not be
604 <p>Of course, bugs reported with a suggested patch for fixing them will
605 probably be processed faster than those without.</p>
607 <p>If you're looking for help, a quick look at <a
608 href="http://mail.gnome.org/archives/xml/">the list archive</a> may actually
609 provide the answer. I usually send source samples when answering libxml2
610 usage questions. The <a
611 href="http://xmlsoft.org/html/book1.html">auto-generated documentation</a> is
612 not as polished as I would like (i need to learn more about DocBook), but
613 it's a good starting point.</p>
615 <h2><a name="help">How to help</a></h2>
617 <p>You can help the project in various ways, the best thing to do first is to
618 subscribe to the mailing-list as explained before, check the <a
619 href="http://mail.gnome.org/archives/xml/">archives </a>and the <a
620 href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Gnome bug
623 <li>Provide patches when you find problems.</li>
624 <li>Provide the diffs when you port libxml2 to a new platform. They may not
625 be integrated in all cases but help pinpointing portability problems
627 <li>Provide documentation fixes (either as patches to the code comments or
629 <li>Provide new documentations pieces (translations, examples, etc
631 <li>Check the TODO file and try to close one of the items.</li>
632 <li>Take one of the points raised in the archive or the bug database and
633 provide a fix. <a href="mailto:daniel@veillard.com">Get in touch with me
634 </a>before to avoid synchronization problems and check that the suggested
635 fix will fit in nicely :-)</li>
638 <h2><a name="Downloads">Downloads</a></h2>
640 <p>The latest versions of libxml2 can be found on the <a
641 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a> server ( <a
642 href="ftp://xmlsoft.org/libxml2/">FTP</a> and rsync are available), there are also
643 mirrors (<a href="ftp://fr.rpmfind.net/pub/libxml/">France</a> and
644 Antonin Sprinzl also provide <a href="ftp://gd.tuwien.ac.at/pub/libxml/">a
645 mirror in Austria</a>). (NOTE that you need both the <a
646 href="http://rpmfind.net/linux/RPM/libxml2.html">libxml(2)</a> and <a
647 href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml(2)-devel</a>
648 packages installed to compile applications using libxml if using RPMs.)</p>
650 <p>You can find all the history of libxml(2) and libxslt releases in the <a
651 href="http://xmlsoft.org/sources/old/">old</a> directory. The precompiled
652 Windows binaries made by Igor Zlatovic are available in the <a
653 href="http://xmlsoft.org/sources/win32/">win32</a> directory.</p>
657 <li>RPMs for x86_64 are available directly on <a
658 href="ftp://xmlsoft.org/libxml2/">xmlsoft.org</a>, the source RPM will compile on
659 any architecture supported.</li>
660 <li><a href="mailto:igor@zlatkovic.com">Igor Zlatkovic</a> is now the
661 maintainer of the Windows port, <a
662 href="http://www.zlatkovic.com/projects/libxml/index.html">he provides
664 <li>OpenCSW provides <a
665 href="http://opencsw.org/packages/libxml2">Solaris
667 <li><a href="mailto:Steve.Ball@explain.com.au">Steve Ball</a> provides <a
668 href="http://www.explain.com.au/oss/libxml2xslt.html">Mac Os X
670 <li>The HP-UX porting center provides <a
671 href="http://hpux.connect.org.uk/hppd/hpux/Gnome/">HP-UX binaries</a></li>
672 <li>Bull provides precompiled <a
673 href="http://gnome.bullfreeware.com/new_index.html">RPMs for AIX</a> as
674 patr of their GNOME packages</li>
677 <p>If you know other supported binary ports, please <a
678 href="http://veillard.com/">contact me</a>.</p>
680 <p><a name="Snapshot">Snapshot:</a></p>
682 <li>Code from the GNOME GIT base libxml2 module, updated hourly <a
683 href="ftp://xmlsoft.org/libxml2/libxml2-git-snapshot.tar.gz">libxml2-git-snapshot.tar.gz</a>.</li>
684 <li>Docs, content of the web site, the list archive included <a
685 href="ftp://xmlsoft.org/libxml2/libxml-docs.tar.gz">libxml-docs.tar.gz</a>.</li>
688 <p><a name="Contribs">Contributions:</a></p>
690 <p>I do accept external contributions, especially if compiling on another
691 platform, get in touch with the list to upload the package, wrappers for
692 various languages have been provided, and can be found in the <a
693 href="python.html">bindings section</a></p>
695 <p>Libxml2 is also available from GIT:</p>
697 <li><p>See <a href="http://git.gnome.org/browse/libxml2/">libxml2 Git web</a>.
698 To checkout a local tree use:</p>
699 <pre>git clone git://git.gnome.org/libxml2</pre>
701 <li>The <strong>libxslt</strong> module is also present
702 <a href="http://git.gnome.org/browse/libxslt/">there</a>.</li>
705 <h2><a name="News">Releases</a></h2>
707 <p>The <a href="ChangeLog.html">change log</a> describes the recents commits
708 to the <a href="http://git.gnome.org/browse/libxml2/">GIT</a> code base.</p>
710 <p>Here is the list of public releases:</p>
712 <h3>v2.9.6: Oct 06 2017</h3>
714 <li>Portability:<br/>
715 Change preprocessor OS tests to __linux__ (Nick Wellnhofer)<br/>
719 Fix XPath stack frame logic (Nick Wellnhofer),<br/>
720 Report undefined XPath variable error message (Nick Wellnhofer),<br/>
721 Fix regression with librsvg (Nick Wellnhofer),<br/>
722 Handle more invalid entity values in recovery mode (Nick Wellnhofer),<br/>
723 Fix structured validation errors (Nick Wellnhofer),<br/>
724 Fix memory leak in LZMA decompressor (Nick Wellnhofer),<br/>
725 Set memory limit for LZMA decompression (Nick Wellnhofer),<br/>
726 Handle illegal entity values in recovery mode (Nick Wellnhofer),<br/>
727 Fix debug dump of streaming XPath expressions (Nick Wellnhofer),<br/>
728 Fix memory leak in nanoftp (Nick Wellnhofer),<br/>
729 Fix memory leaks in SAX1 parser (Nick Wellnhofer)<br/>
732 <h3>v2.9.5: Sep 04 2017</h3>
736 Detect infinite recursion in parameter entities (Nick Wellnhofer),<br/>
737 Fix handling of parameter-entity references (Nick Wellnhofer),<br/>
738 Disallow namespace nodes in XPointer ranges (Nick Wellnhofer),<br/>
739 Fix XPointer paths beginning with range-to (Nick Wellnhofer)<br/>
742 <li>Documentation:<br/>
743 Documentation fixes (Nick Wellnhofer),<br/>
744 Spelling and grammar fixes (Nick Wellnhofer)<br/>
747 <li>Portability:<br/>
748 Adding README.zOS to list of extra files for the release (Daniel Veillard),<br/>
749 Description of work needed to compile on zOS (Stéphane Michaut),<br/>
750 Porting libxml2 on zOS encoding of code (Stéphane Michaut),<br/>
751 small changes for OS/400 (Patrick Monnerat),<br/>
752 relaxng.c, xmlschemas.c: Fix build on pre-C99 compilers (Chun-wei Fan)<br/>
756 Problem resolving relative URIs (Daniel Veillard),<br/>
757 Fix unwanted warnings when switching encodings (Nick Wellnhofer),<br/>
758 Fix signature of xmlSchemaAugmentImportedIDC (Daniel Veillard),<br/>
759 Heap-buffer-overflow read of size 1 in xmlFAParsePosCharGroup (David Kilzer),<br/>
760 Fix NULL pointer deref in xmlFAParseCharClassEsc (Nick Wellnhofer),<br/>
761 Fix infinite loops with push parser in recovery mode (Nick Wellnhofer),<br/>
762 Send xmllint usage error to stderr (Nick Wellnhofer),<br/>
763 Fix NULL deref in xmlParseExternalEntityPrivate (Nick Wellnhofer),<br/>
764 Make sure not to call IS_BLANK_CH when parsing the DTD (Nick Wellnhofer),<br/>
765 Fix xmlHaltParser (Nick Wellnhofer),<br/>
766 Fix pathological performance when outputting charrefs (Nick Wellnhofer),<br/>
767 Fix invalid-source-encoding warnings in testWriter.c (Nick Wellnhofer),<br/>
768 Fix duplicate SAX callbacks for entity content (David Kilzer),<br/>
769 Treat URIs with scheme as absolute in C14N (Nick Wellnhofer),<br/>
770 Fix copy-paste errors in error messages (Nick Wellnhofer),<br/>
771 Fix sanity check in htmlParseNameComplex (Nick Wellnhofer),<br/>
772 Fix potential infinite loop in xmlStringLenDecodeEntities (Nick Wellnhofer),<br/>
773 Reset parser input pointers on encoding failure (Nick Wellnhofer),<br/>
774 Fix memory leak in xmlParseEntityDecl error path (Nick Wellnhofer),<br/>
775 Fix xmlBuildRelativeURI for URIs starting with './' (Nick Wellnhofer),<br/>
776 Fix type confusion in xmlValidateOneNamespace (Nick Wellnhofer),<br/>
777 Fix memory leak in xmlStringLenGetNodeList (Nick Wellnhofer),<br/>
778 Fix NULL pointer deref in xmlDumpElementContent (Daniel Veillard),<br/>
779 Fix memory leak in xmlBufAttrSerializeTxtContent (Nick Wellnhofer),<br/>
780 Stop parser on unsupported encodings (Nick Wellnhofer),<br/>
781 Check for integer overflow in memory debug code (Nick Wellnhofer),<br/>
782 Fix buffer size checks in xmlSnprintfElementContent (Nick Wellnhofer),<br/>
783 Avoid reparsing in xmlParseStartTag2 (Nick Wellnhofer),<br/>
784 Fix undefined behavior in xmlRegExecPushStringInternal (Nick Wellnhofer),<br/>
785 Check XPath exponents for overflow (Nick Wellnhofer),<br/>
786 Check for overflow in xmlXPathIsPositionalPredicate (Nick Wellnhofer),<br/>
787 Fix spurious error message (Nick Wellnhofer),<br/>
788 Fix memory leak in xmlCanonicPath (Nick Wellnhofer),<br/>
789 Fix memory leak in xmlXPathCompareNodeSetValue (Nick Wellnhofer),<br/>
790 Fix memory leak in pattern error path (Nick Wellnhofer),<br/>
791 Fix memory leak in parser error path (Nick Wellnhofer),<br/>
792 Fix memory leaks in XPointer error paths (Nick Wellnhofer),<br/>
793 Fix memory leak in xmlXPathNodeSetMergeAndClear (Nick Wellnhofer),<br/>
794 Fix memory leak in XPath filter optimizations (Nick Wellnhofer),<br/>
795 Fix memory leaks in XPath error paths (Nick Wellnhofer),<br/>
796 Do not leak the new CData node if adding fails (David Tardon),<br/>
797 Prevent unwanted external entity reference (Neel Mehta),<br/>
798 Increase buffer space for port in HTTP redirect support (Daniel Veillard),<br/>
799 Fix more NULL pointer derefs in xpointer.c (Nick Wellnhofer),<br/>
800 Avoid function/data pointer conversion in xpath.c (Nick Wellnhofer),<br/>
801 Fix format string warnings (Nick Wellnhofer),<br/>
802 Disallow namespace nodes in XPointer points (Nick Wellnhofer),<br/>
803 Fix comparison with root node in xmlXPathCmpNodes (Nick Wellnhofer),<br/>
804 Fix attribute decoding during XML schema validation (Alex Henrie),<br/>
805 Fix NULL pointer deref in XPointer range-to (Nick Wellnhofer)<br/>
808 <li>Improvements:<br/>
809 Updating the spec file to reflect Fedora 24 (Daniel Veillard),<br/>
810 Add const in five places to move 1 KiB to .rdata (Bruce Dawson),<br/>
811 Fix missing part of comment for function xmlXPathEvalExpression() (Daniel Veillard),<br/>
812 Get rid of "blanks wrapper" for parameter entities (Nick Wellnhofer),<br/>
813 Simplify handling of parameter entity references (Nick Wellnhofer),<br/>
814 Deduplicate code in encoding.c (Nick Wellnhofer),<br/>
815 Make HTML parser functions take const pointers (Nick Wellnhofer),<br/>
816 Build test programs only when needed (Nick Wellnhofer),<br/>
817 Fix doc/examples/index.py (Nick Wellnhofer),<br/>
818 Fix compiler warnings in threads.c (Nick Wellnhofer),<br/>
819 Fix empty-body warning in nanohttp.c (Nick Wellnhofer),<br/>
820 Fix cast-align warnings (Nick Wellnhofer),<br/>
821 Fix unused-parameter warnings (Nick Wellnhofer),<br/>
822 Rework entity boundary checks (Nick Wellnhofer),<br/>
823 Don't switch encoding for internal parameter entities (Nick Wellnhofer),<br/>
824 Merge duplicate code paths handling PE references (Nick Wellnhofer),<br/>
825 Test SAX2 callbacks with entity substitution (Nick Wellnhofer),<br/>
826 Support catalog and threads tests under --without-sax1 (Nick Wellnhofer),<br/>
827 Misc fixes for 'make tests' (Nick Wellnhofer),<br/>
828 Initialize keepBlanks in HTML parser (Nick Wellnhofer),<br/>
829 Add test cases for bug 758518 (David Kilzer),<br/>
830 Fix compiler warning in htmlParseElementInternal (Nick Wellnhofer),<br/>
831 Remove useless check in xmlParseAttributeListDecl (Nick Wellnhofer),<br/>
832 Allow zero sized memory input buffers (Nick Wellnhofer),<br/>
833 Add TODO comment in xmlSwitchEncoding (Nick Wellnhofer),<br/>
834 Check for integer overflow in xmlXPathFormatNumber (Nick Wellnhofer),<br/>
835 Make Travis print UBSan stacktraces (Nick Wellnhofer),<br/>
836 Add .travis.yml (Nick Wellnhofer),<br/>
837 Fix expected error output in Python tests (Nick Wellnhofer),<br/>
838 Simplify control flow in xmlParseStartTag2 (Nick Wellnhofer),<br/>
839 Disable LeakSanitizer when running API tests (Nick Wellnhofer),<br/>
840 Avoid out-of-bound array access in API tests (Nick Wellnhofer),<br/>
841 Avoid spurious UBSan errors in parser.c (Nick Wellnhofer),<br/>
842 Parse small XPath numbers more accurately (Nick Wellnhofer),<br/>
843 Rework XPath rounding functions (Nick Wellnhofer),<br/>
844 Fix white space in test output (Nick Wellnhofer),<br/>
845 Fix axis traversal from attribute and namespace nodes (Nick Wellnhofer),<br/>
846 Check for trailing characters in XPath expressions earlier (Nick Wellnhofer),<br/>
847 Rework final handling of XPath results (Nick Wellnhofer),<br/>
848 Make xmlXPathEvalExpression call xmlXPathEval (Nick Wellnhofer),<br/>
849 Remove unused variables (Nick Wellnhofer),<br/>
850 Don't print generic error messages in XPath tests (Nick Wellnhofer)<br/>
854 Fix a couple of misleading indentation errors (Daniel Veillard),<br/>
855 Remove unnecessary calls to xmlPopInput (Nick Wellnhofer)<br/>
858 <h3>2.9.4: May 23 2016</h3>
861 More format string warnings with possible format string vulnerability (David Kilzer),<br/>
862 Avoid building recursive entities (Daniel Veillard),<br/>
863 Heap-based buffer overread in htmlCurrentChar (Pranjal Jumde),<br/>
864 Heap-based buffer-underreads due to xmlParseName (David Kilzer),<br/>
865 Heap use-after-free in xmlSAX2AttributeNs (Pranjal Jumde),<br/>
866 Heap use-after-free in htmlParsePubidLiteral and htmlParseSystemiteral (Pranjal Jumde),<br/>
867 Fix some format string warnings with possible format string vulnerability (David Kilzer),<br/>
868 Detect change of encoding when parsing HTML names (Hugh Davenport),<br/>
869 Fix inappropriate fetch of entities content (Daniel Veillard),<br/>
870 Bug 759398: Heap use-after-free in xmlDictComputeFastKey <https://bugzilla.gnome.org/show_bug.cgi?id=759398> (Pranjal Jumde),<br/>
871 Bug 758605: Heap-based buffer overread in xmlDictAddString <https://bugzilla.gnome.org/show_bug.cgi?id=758605> (Pranjal Jumde),<br/>
872 Bug 758588: Heap-based buffer overread in xmlParserPrintFileContextInternal <https://bugzilla.gnome.org/show_bug.cgi?id=758588> (David Kilzer),<br/>
873 Bug 757711: heap-buffer-overflow in xmlFAParsePosCharGroup <https://bugzilla.gnome.org/show_bug.cgi?id=757711> (Pranjal Jumde),<br/>
874 Add missing increments of recursion depth counter to XML parser. (Peter Simons)<br/>
877 <li>Documentation:<br/>
878 Fix typo: s{ ec -> cr }cipt (Jan Pokorný),<br/>
879 Fix typos: dictio{ nn -> n }ar{y,ies} (Jan Pokorný),<br/>
880 Fix typos: PATH_{ SEAPARATOR -> SEPARATOR } (Jan Pokorný),<br/>
881 Correct a typo. (Shlomi Fish)<br/>
884 <li>Portability:<br/>
885 Correct the usage of LDFLAGS (Mattias Hansson),<br/>
886 Revert the use of SAVE_LDFLAGS in configure.ac (Mattias Hansson),<br/>
887 libxml2 hardcodes -L/lib in zlib/lzma tests which breaks cross-compiles (Mike Frysinger),<br/>
888 Fix apibuild for a recently added construct (Daniel Veillard),<br/>
889 Use pkg-config to locate zlib when possible (Stewart Brodie),<br/>
890 Use pkg-config to locate ICU when possible (Stewart Brodie),<br/>
891 Portability to non C99 compliant compilers (Patrick Monnerat),<br/>
892 dict.h: Move xmlDictPtr definition before includes to allow direct inclusion. (Patrick Monnerat),<br/>
893 os400: tell about xmllint and xmlcatalog in README400. (Patrick Monnerat),<br/>
894 os400: properly process SGML add in XMLCATALOG command. (Patrick Monnerat),<br/>
895 os400: implement CL command XMLCATALOG. (Patrick Monnerat),<br/>
896 os400: compile and install program xmlcatalog (qshell-only). (Patrick Monnerat),<br/>
897 os400: expand tabs in sources, strip trailing blanks. (Patrick Monnerat),<br/>
898 os400: implement CL command XMLLINT. (Patrick Monnerat),<br/>
899 os400: compile and install program xmllint (qshell-only). (Patrick Monnerat),<br/>
900 os400: initscript make_module(): Use options instead of positional parameters. (Patrick Monnerat),<br/>
901 os400: c14n.rpgle: allow *omit for nullable reference parameters. (Patrick Monnerat),<br/>
902 os400: use like() for double type. (Patrick Monnerat),<br/>
903 os400: use like() for int type. (Patrick Monnerat),<br/>
904 os400: use like() for unsigned int type. (Patrick Monnerat),<br/>
905 os400: use like() for enum types. (Patrick Monnerat),<br/>
906 Add xz to xml2-config --libs output (Baruch Siach),<br/>
907 Bug 760190: configure.ac should be able to build --with-icu without icu-config tool <https://bugzilla.gnome.org/show_bug.cgi?id=760190> (David Kilzer),<br/>
908 win32\VC10\config.h and VS 2015 (Bruce Dawson),<br/>
909 Add configure maintainer mode (orzen)<br/>
913 Avoid an out of bound access when serializing malformed strings (Daniel Veillard),<br/>
914 Unsigned addition may overflow in xmlMallocAtomicLoc() (David Kilzer),<br/>
915 Integer signed/unsigned type mismatch in xmlParserInputGrow() (David Kilzer),<br/>
916 Bug 763071: heap-buffer-overflow in xmlStrncat <https://bugzilla.gnome.org/show_bug.cgi?id=763071> (Pranjal Jumde),<br/>
917 Integer overflow parsing port number in URI (Michael Paddon),<br/>
918 Fix an error with regexp on nullable counted char transition (Daniel Veillard),<br/>
919 Fix memory leak with XPath namespace nodes (Nick Wellnhofer),<br/>
920 Fix namespace axis traversal (Nick Wellnhofer),<br/>
921 Fix null pointer deref in docs with no root element (Hugh Davenport),<br/>
922 Fix XSD validation of URIs with ampersands (Alex Henrie),<br/>
923 xmlschemastypes.c: accept endOfDayFrag Times set to "24:00:00" mean "end of day" and should not cause an error. (Patrick Monnerat),<br/>
924 xmlcatalog: flush stdout before interactive shell input. (Patrick Monnerat),<br/>
925 xmllint: flush stdout before interactive shell input. (Patrick Monnerat),<br/>
926 Don't recurse into OP_VALUEs in xmlXPathOptimizeExpression (Nick Wellnhofer),<br/>
927 Fix namespace::node() XPath expression (Nick Wellnhofer),<br/>
928 Fix OOB write in xmlXPathEmptyNodeSet (Nick Wellnhofer),<br/>
929 Fix parsing of NCNames in XPath (Nick Wellnhofer),<br/>
930 Fix OOB read with invalid UTF-8 in xmlUTF8Strsize (Nick Wellnhofer),<br/>
931 Do normalize string-based datatype value in RelaxNG facet checking (Audric Schiltknecht),<br/>
932 Bug 760921: REGRESSION (8eb55d78): doc/examples/io1 test fails after fix for "xmlSaveUri() incorrectly recomposes URIs with rootless paths" <https://bugzilla.gnome.org/show_bug.cgi?id=760921> (David Kilzer),<br/>
933 Bug 760861: REGRESSION (bf9c1dad): Missing results for test/schemas/regexp-char-ref_[01].xsd <https://bugzilla.gnome.org/show_bug.cgi?id=760861> (David Kilzer),<br/>
934 error.c: *input->cur == 0 does not mean no error (Pavel Raiskup),<br/>
935 Add missing RNG test files (David Kilzer),<br/>
936 Bug 760183: REGRESSION (v2.9.3): XML push parser fails with bogus UTF-8 encoding error when multi-byte character in large CDATA section is split across buffer <https://bugzilla.gnome.org/show_bug.cgi?id=760183> (David Kilzer),<br/>
937 Bug 758572: ASAN crash in make check <https://bugzilla.gnome.org/show_bug.cgi?id=758572> (David Kilzer),<br/>
938 Bug 721158: Missing ICU string when doing --version on xmllint <https://bugzilla.gnome.org/show_bug.cgi?id=721158> (David Kilzer),<br/>
939 python 3: libxml2.c wrappers create Unicode str already (Michael Stahl),<br/>
940 Add autogen.sh to distrib (orzen),<br/>
941 Heap-based buffer overread in xmlNextChar (Daniel Veillard)<br/>
944 <li>Improvements:<br/>
945 Add more debugging info to runtest (Daniel Veillard),<br/>
946 Implement "runtest -u" mode (David Kilzer),<br/>
947 Add a make rule to rebuild for ASAN (Daniel Veillard)<br/>
950 <h3>v2.9.3: Nov 20 2015</h3>
953 CVE-2015-8242 Buffer overead with HTML parser in push mode (Hugh Davenport),<br/>
954 CVE-2015-7500 Fix memory access error due to incorrect entities boundaries (Daniel Veillard),<br/>
955 CVE-2015-7499-2 Detect incoherency on GROW (Daniel Veillard),<br/>
956 CVE-2015-7499-1 Add xmlHaltParser() to stop the parser (Daniel Veillard),<br/>
957 CVE-2015-5312 Another entity expansion issue (David Drysdale),<br/>
958 CVE-2015-7497 Avoid an heap buffer overflow in xmlDictComputeFastQKey (David Drysdale),<br/>
959 CVE-2015-7498 Avoid processing entities after encoding conversion failures (Daniel Veillard),<br/>
960 CVE-2015-8035 Fix XZ compression support loop (Daniel Veillard),<br/>
961 CVE-2015-7942-2 Fix an error in previous Conditional section patch (Daniel Veillard),<br/>
962 CVE-2015-7942 Another variation of overflow in Conditional sections (Daniel Veillard),<br/>
963 CVE-2015-1819 Enforce the reader to run in constant memory (Daniel Veillard)<br/>
964 CVE-2015-7941_2 Cleanup conditional section error handling (Daniel Veillard),<br/>
965 CVE-2015-7941_1 Stop parsing on entities boundaries errors (Daniel Veillard),<br/>
968 <li>Documentation:<br/>
969 Correct spelling of "calling" (Alex Henrie),<br/>
970 Fix a small error in xmllint --format description (Fabien Degomme),<br/>
971 Avoid XSS on the search of xmlsoft.org (Daniel Veillard)<br/>
974 <li>Portability:<br/>
975 threads: use forward declarations only for glibc (Michael Heimpold),<br/>
976 Update Win32 configure.js to search for configure.ac (Daniel Veillard)<br/>
980 Bug on creating new stream from entity (Daniel Veillard),<br/>
981 Fix some loop issues embedding NEXT (Daniel Veillard),<br/>
982 Do not print error context when there is none (Daniel Veillard),<br/>
983 Avoid extra processing of MarkupDecl when EOF (Hugh Davenport),<br/>
984 Fix parsing short unclosed comment uninitialized access (Daniel Veillard),<br/>
985 Add missing Null check in xmlParseExternalEntityPrivate (Gaurav Gupta),<br/>
986 Fix a bug in CData error handling in the push parser (Daniel Veillard),<br/>
987 Fix a bug on name parsing at the end of current input buffer (Daniel Veillard),<br/>
988 Fix the spurious ID already defined error (Daniel Veillard),<br/>
989 Fix previous change to node sort order (Nick Wellnhofer),<br/>
990 Fix a self assignment issue raised by clang (Scott Graham),<br/>
991 Fail parsing early on if encoding conversion failed (Daniel Veillard),<br/>
992 Do not process encoding values if the declaration if broken (Daniel Veillard),<br/>
993 Silence clang's -Wunknown-attribute (Michael Catanzaro),<br/>
994 xmlMemUsed is not thread-safe (Martin von Gagern),<br/>
995 Fix support for except in nameclasses (Daniel Veillard),<br/>
996 Fix order of root nodes (Nick Wellnhofer),<br/>
997 Allow attributes on descendant-or-self axis (Nick Wellnhofer),<br/>
998 Fix the fix to Windows locking (Steve Nairn),<br/>
999 Fix timsort invariant loop re: Envisage article (Christopher Swenson),<br/>
1000 Don't add IDs in xmlSetTreeDoc (Nick Wellnhofer),<br/>
1001 Account for ID attributes in xmlSetTreeDoc (Nick Wellnhofer),<br/>
1002 Remove various unused value assignments (Philip Withnall),<br/>
1003 Fix missing entities after CVE-2014-3660 fix (Daniel Veillard),<br/>
1004 Revert "Missing initialization for the catalog module" (Daniel Veillard)<br/>
1007 <li>Improvements:<br/>
1008 Reuse xmlHaltParser() where it makes sense (Daniel Veillard),<br/>
1009 xmlStopParser reset errNo (Daniel Veillard),<br/>
1010 Reenable xz support by default (Daniel Veillard),<br/>
1011 Recover unescaped less-than character in HTML recovery parsing (Daniel Veillard),<br/>
1012 Allow HTML serializer to output HTML5 DOCTYPE (Shaun McCance),<br/>
1013 Regression test for bug #695699 (Nick Wellnhofer),<br/>
1014 Add a couple of XPath tests (Nick Wellnhofer),<br/>
1015 Add Python 3 rpm subpackage (Tomas Radej),<br/>
1016 libxml2-config.cmake.in: update include directories (Samuel Martin),<br/>
1017 Adding example from bugs 738805 to regression tests (Daniel Veillard)<br/>
1023 <h3>2.9.2: Oct 16 2014</h3>
1026 Fix for CVE-2014-3660 billion laugh variant (Daniel Veillard),<br/>
1027 CVE-2014-0191 Do not fetch external parameter entities (Daniel Veillard)<br/>
1031 fix memory leak xml header encoding field with XML_PARSE_IGNORE_ENC (Bart De Schuymer),<br/>
1032 xmlmemory: handle realloc properly (Yegor Yefremov),<br/>
1033 Python generator bug raised by the const change (Daniel Veillard),<br/>
1034 Windows Critical sections not released correctly (Daniel Veillard),<br/>
1035 Parser error on repeated recursive entity expansion containing &lt; (Daniel Veillard),<br/>
1036 xpointer : fixing Null Pointers (Gaurav Gupta),<br/>
1037 Remove Unnecessary Null check in xpointer.c (Gaurav Gupta),<br/>
1038 parser bug on misformed namespace attributes (Dennis Filder),<br/>
1039 Pointer dereferenced before null check (Daniel Veillard),<br/>
1040 Leak of struct addrinfo in xmlNanoFTPConnect() (Gaurav Gupta),<br/>
1041 Possible overflow in HTMLParser.c (Daniel Veillard),<br/>
1042 python/tests/sync.py assumes Python dictionaries are ordered (John Beck),<br/>
1043 Fix Enum check and missing break (Gaurav Gupta),<br/>
1044 xmlIO: Handle error returns from dup() (Philip Withnall),<br/>
1045 Fix a problem properly saving URIs (Daniel Veillard),<br/>
1046 wrong error column in structured error when parsing attribute values (Juergen Keil),<br/>
1047 wrong error column in structured error when skipping whitespace in xml decl (Juergen Keil),<br/>
1048 no error column in structured error handler for xml schema validation errors (Juergen Keil),<br/>
1049 Couple of Missing Null checks (Gaurav Gupta),<br/>
1050 Add couple of missing Null checks (Daniel Veillard),<br/>
1051 xmlschemastypes: Fix potential array overflow (Philip Withnall),<br/>
1052 runtest: Fix a memory leak on parse failure (Philip Withnall),<br/>
1053 xmlIO: Fix an FD leak on gzdopen() failure (Philip Withnall),<br/>
1054 xmlcatalog: Fix a memory leak on quit (Philip Withnall),<br/>
1055 HTMLparser: Correctly initialise a stack allocated structure (Philip Withnall),<br/>
1056 Check for tmon in _xmlSchemaDateAdd() is incorrect (David Kilzer),<br/>
1057 Avoid Possible Null Pointer in trio.c (Gaurav Gupta),<br/>
1058 Fix processing in SAX2 in case of an allocation failure (Daniel Veillard),<br/>
1059 XML Shell command "cd" does not handle "/" at end of path (Daniel Veillard),<br/>
1060 Fix various Missing Null checks (Gaurav Gupta),<br/>
1061 Fix a potential NULL dereference (Daniel Veillard),<br/>
1062 Add a couple of misisng check in xmlRelaxNGCleanupTree (Gaurav Gupta),<br/>
1063 Add a missing argument check (Gaurav Gupta),<br/>
1064 Adding a check in case of allocation error (Gaurav Gupta),<br/>
1065 xmlSaveUri() incorrectly recomposes URIs with rootless paths (Dennis Filder),<br/>
1066 Adding some missing NULL checks (Gaurav),<br/>
1067 Fixes for xmlInitParserCtxt (Daniel Veillard),<br/>
1068 Fix regressions introduced by CVE-2014-0191 patch (Daniel Veillard),<br/>
1069 erroneously ignores a validation error if no error callback set (Daniel Veillard),<br/>
1070 xmllint was not parsing the --c14n11 flag (Sérgio Batista),<br/>
1071 Avoid Possible null pointer dereference in memory debug mode (Gaurav),<br/>
1072 Avoid Double Null Check (Gaurav),<br/>
1073 Restore context size and position after XPATH_OP_ARG (Nick Wellnhofer),<br/>
1074 Fix xmlParseInNodeContext() if node is not element (Daniel Veillard),<br/>
1075 Avoid a possible NULL pointer dereference (Gaurav),<br/>
1076 Fix xmlTextWriterWriteElement when a null content is given (Daniel Veillard),<br/>
1077 Fix an typo 'onrest' in htmlScriptAttributes (Daniel Veillard),<br/>
1078 fixing a ptotential uninitialized access (Daniel Veillard),<br/>
1079 Fix an fd leak in an error case (Daniel Veillard),<br/>
1080 Missing initialization for the catalog module (Daniel Veillard),<br/>
1081 Handling of XPath function arguments in error case (Nick Wellnhofer),<br/>
1082 Fix a couple of missing NULL checks (Gaurav),<br/>
1083 Avoid a possibility of dangling encoding handler (Gaurav),<br/>
1084 Fix HTML push parser to accept HTML_PARSE_NODEFDTD (Arnold Hendriks),<br/>
1085 Fix a bug loading some compressed files (Mike Alexander),<br/>
1086 Fix XPath node comparison bug (Gaurav),<br/>
1087 Type mismatch in xmlschemas.c (Gaurav),<br/>
1088 Type mismatch in xmlschemastypes.c (Gaurav),<br/>
1089 Avoid a deadcode in catalog.c (Daniel Veillard),<br/>
1090 run close socket on Solaris, same as we do on other platforms (Denis Pauk),<br/>
1091 Fix pointer dereferenced before null check (Gaurav),<br/>
1092 Fix a potential NULL dereference in tree code (Daniel Veillard),<br/>
1093 Fix potential NULL pointer dereferences in regexp code (Gaurav),<br/>
1094 xmllint --pretty crashed without following numeric argument (Tim Galeckas),<br/>
1095 Fix XPath expressions of the form '@ns:*' (Nick Wellnhofer),<br/>
1096 Fix XPath '//' optimization with predicates (Nick Wellnhofer),<br/>
1097 Clear up a potential NULL dereference (Daniel Veillard),<br/>
1098 Fix a possible NULL dereference (Gaurav),<br/>
1099 Avoid crash if allocation fails (Daniel Veillard),<br/>
1100 Remove occasional leading space in XPath number formatting (Daniel Veillard),<br/>
1101 Fix handling of mmap errors (Daniel Veillard),<br/>
1102 Catch malloc error and exit accordingly (Daniel Veillard),<br/>
1103 missing else in xlink.c (Ami Fischman),<br/>
1104 Fix a parsing bug on non-ascii element and CR/LF usage (Daniel Veillard),<br/>
1105 Fix a regression in xmlGetDocCompressMode() (Daniel Veillard),<br/>
1106 properly quote the namespace uris written out during c14n (Aleksey Sanin),<br/>
1107 Remove premature XInclude check on URI being relative (Alexey Neyman),<br/>
1108 Fix missing break on last() function for attributes (dcb),<br/>
1109 Do not URI escape in server side includes (Romain Bondue),<br/>
1110 Fix an error in xmlCleanupParser (Alexander Pastukhov)<br/>
1113 <li>Documentation:<br/>
1114 typo in error messages "colon are forbidden from..." (Daniel Veillard),<br/>
1115 Fix a link to James SAX documentation old page (Daniel Veillard),<br/>
1116 Fix typos in relaxng.c (Jan Pokorný),<br/>
1117 Fix a doc typo (Daniel Veillard),<br/>
1118 Fix typos in {tree,xpath}.c (errror) (Jan Pokorný),<br/>
1119 Add limitations about encoding conversion (Daniel Veillard),<br/>
1120 Fix typos in xmlschemas{,types}.c (Jan Pokorný),<br/>
1121 Fix incorrect spelling entites->entities (Jan Pokorný),<br/>
1122 Forgot to document 2.9.1 release, regenerate docs (Daniel Veillard)<br/>
1125 <li>Portability:<br/>
1126 AC_CONFIG_FILES and executable bit (Roumen Petrov),<br/>
1127 remove HAVE_CONFIG_H dependency in testlimits.c (Roumen Petrov),<br/>
1128 fix some tabs mixing incompatible with python3 (Roumen Petrov),<br/>
1129 Visual Studio 14 CTP defines snprintf() (Francis Dupont),<br/>
1130 OS400: do not try to copy unexisting doc files (Patrick Monnerat),<br/>
1131 OS400: use either configure.ac or configure.in. (Patrick Monnerat),<br/>
1132 os400: make-src.sh: create physical file with target CCSID (Patrick Monnerat),<br/>
1133 OS400: Add some more C macros equivalent procedures. (Patrick Monnerat),<br/>
1134 OS400: use C macros to implement equivalent RPG support procedures. (Patrick Monnerat),<br/>
1135 OS400: implement XPath macros as procedures for ILE/RPG support. (Patrick Monnerat),<br/>
1136 OS400: include in distribution tarball. (Patrick Monnerat),<br/>
1137 OS400: Add README: compilation directives and OS/400 specific stuff. (Patrick Monnerat),<br/>
1138 OS400: Add compilation scripts. (Patrick Monnerat),<br/>
1139 OS400: ILE RPG language header files. (Patrick Monnerat),<br/>
1140 OS400: implement some macros as functions for ILE/RPG language support (that as no macros). (Patrick Monnerat),<br/>
1141 OS400: UTF8<-->EBCDIC wrappers for system and external library calls (Patrick Monnerat),<br/>
1142 OS400: Easy character transcoding support (Patrick Monnerat),<br/>
1143 OS400: iconv functions compatibility wrappers and table builder. (Patrick Monnerat),<br/>
1144 OS400: create architecture directory. Implement dlfcn emulation. (Patrick Monnerat),<br/>
1145 Fix building when configuring without xpath and xptr (Daniel Veillard),<br/>
1146 configure: Add --with-python-install-dir (Jonas Eriksson),<br/>
1147 Fix compilation with minimum and xinclude. (Nicolas Le Cam),<br/>
1148 Compile out use of xmlValidateNCName() when not available. (Nicolas Le Cam),<br/>
1149 Fix compilation with minimum and schematron. (Nicolas Le Cam),<br/>
1150 Legacy needs xmlSAX2StartElement() and xmlSAX2EndElement(). (Nicolas Le Cam),<br/>
1151 Don't use xmlValidateName() when not available. (Nicolas Le Cam),<br/>
1152 Fix a portability issue on Windows (Longstreth Jon),<br/>
1153 Various portability patches for OpenVMS (Jacob (Jouk) Jansen),<br/>
1154 Use specific macros for portability to OS/400 (Patrick Monnerat),<br/>
1155 Add macros needed for OS/400 portability (Patrick Monnerat),<br/>
1156 Portability patch for fopen on OS/400 (Patrick Monnerat),<br/>
1157 Portability fixes for OS/400 (Patrick Monnerat),<br/>
1158 Improve va_list portability (Patrick Monnerat),<br/>
1159 Portability fix (Patrick Monnerat),<br/>
1160 Portability fix (Patrick Monnerat),<br/>
1161 Generic portability fix (Patrick Monnerat),<br/>
1162 Shortening lines in headers (Patrick Monnerat),<br/>
1163 build: Use pkg-config to find liblzma in preference to AC_CHECK_LIB (Philip Withnall),<br/>
1164 build: Add @LZMA_LIBS@ to libxml’s pkg-config files (Philip Withnall),<br/>
1165 fix some tabs mixing incompatible with python3 (Daniel Veillard),<br/>
1166 add additional defines checks for support "./configure --with-minimum" (Denis Pauk),<br/>
1167 Another round of fixes for older versions of Python (Arfrever Frehtes Taifersar Arahesis),<br/>
1168 python: fix drv_libxml2.py for python3 compatibility (Alexandre Rostovtsev),<br/>
1169 python: Fix compiler warnings when building python3 bindings (Armin K),<br/>
1170 Fix for compilation with python 2.6.8 (Petr Sumbera)<br/>
1173 <li>Improvements:<br/>
1174 win32/libxml2.def.src after rebuild in doc (Roumen Petrov),<br/>
1175 elfgcchack.h: more legacy needs xmlSAX2StartElement() and xmlSAX2EndElement() (Roumen Petrov),<br/>
1176 elfgcchack.h: add xmlXPathNodeEval and xmlXPathSetContextNode (Roumen Petrov),<br/>
1177 Provide cmake module (Samuel Martin),<br/>
1178 Fix a couple of issues raised by make dist (Daniel Veillard),<br/>
1179 Fix and add const qualifiers (Kurt Roeckx),<br/>
1180 Preparing for upcoming release of 2.9.2 (Daniel Veillard),<br/>
1181 Fix zlib and lzma libraries check via command line (Dmitriy),<br/>
1182 wrong error column in structured error when parsing end tag (Juergen Keil),<br/>
1183 doc/news.html: small update to avoid line join while generating NEWS. (Patrick Monnerat),<br/>
1184 Add methods for python3 iterator (Ron Angeles),<br/>
1185 Support element node traversal in document fragments. (Kyle VanderBeek),<br/>
1186 xmlNodeSetName: Allow setting the name to a substring of the currently set name (Tristan Van Berkom),<br/>
1187 Added macros for argument casts (Eric Zurcher),<br/>
1188 adding init calls to xml and html Read parsing entry points (Daniel Veillard),<br/>
1189 Get rid of 'REPLACEMENT CHARACTER' Unicode chars in xmlschemas.c (Jan Pokorný),<br/>
1190 Implement choice for name classes on attributes (Shaun McCance),<br/>
1191 Two small namespace tweaks (Daniel Veillard),<br/>
1192 xmllint --memory should fail on empty files (Daniel Veillard),<br/>
1193 Cast encoding name to char pointer to match arg type (Nikolay Sivov)<br/>
1197 Removal of old configure.in (Daniel Veillard),<br/>
1198 Unreachable code in tree.c (Gaurav Gupta),<br/>
1199 Remove a couple of dead conditions (Gaurav Gupta),<br/>
1200 Avoid some dead code and cleanup in relaxng.c (Gaurav),<br/>
1201 Drop not needed checks (Denis Pauk),<br/>
1202 Fix a wrong test (Daniel Veillard)<br/>
1205 <h3>2.9.1: Apr 19 2013</h3>
1208 Support for Python3 (Daniel Veillard),<br/>
1209 Add xmlXPathSetContextNode and xmlXPathNodeEval (Alex Bligh)<br/>
1212 <li> Documentation:<br/>
1213 Add documentation for xmllint --xpath (Daniel Veillard),<br/>
1214 Fix the URL of the SAX documentation from James (Daniel Veillard),<br/>
1215 Fix spelling of "length". (Michael Wood)<br/>
1218 <li> Portability:<br/>
1219 Fix python bindings with versions older than 2.7 (Daniel Veillard),<br/>
1220 rebuild docs:Makefile.am (Roumen Petrov),<br/>
1221 elfgcchack.h after rebuild in doc (Roumen Petrov),<br/>
1222 elfgcchack for buf module (Roumen Petrov),<br/>
1223 Fix a uneeded and wrong extra link parameter (Daniel Veillard),<br/>
1224 Few cleanup patches for Windows (Denis Pauk),<br/>
1225 Fix rpmbuild --nocheck (Mark Salter),<br/>
1226 Fix for win32/configure.js and WITH_THREAD_ALLOC (Daniel Richard),<br/>
1227 Fix Broken multi-arch support in xml2-config (Daniel Veillard),<br/>
1228 Fix a portability issue for GCC < 3.4.0 (Daniel Veillard),<br/>
1229 Windows build fixes (Daniel Richard),<br/>
1230 Fix a thread portability problem (Friedrich Haubensak),<br/>
1231 Downgrade autoconf requirement to 2.63 (Daniel Veillard)<br/>
1234 <li> Bug Fixes:<br/>
1235 Fix a linking error for python bindings (Daniel Veillard),<br/>
1236 Fix a couple of return without value (Jüri Aedla),<br/>
1237 Improve the hashing functions (Daniel Franke),<br/>
1238 Improve handling of xmlStopParser() (Daniel Veillard),<br/>
1239 Remove risk of lockup in dictionary initialization (Daniel Veillard),<br/>
1240 Activate detection of encoding in external subset (Daniel Veillard),<br/>
1241 Fix an output buffer flushing conversion bug (Mikhail Titov),<br/>
1242 Fix an old bug in xmlSchemaValidateOneElement (Csaba László),<br/>
1243 Fix configure cannot remove messages (Gilles Espinasse),<br/>
1244 fix schema validation in combination with xsi:nil (Daniel Veillard),<br/>
1245 xmlCtxtReadFile doesn't work with literal IPv6 URLs (Steve Wolf),<br/>
1246 Fix a few problems with setEntityLoader (Alexey Neyman),<br/>
1247 Detect excessive entities expansion upon replacement (Daniel Veillard),<br/>
1248 Fix the flushing out of raw buffers on encoding conversions (Daniel,<br/>
1250 Fix some buffer conversion issues (Daniel Veillard),<br/>
1251 When calling xmlNodeDump make sure we grow the buffer quickly (Daniel,<br/>
1253 Fix an error in the progressive DTD parsing code (Dan Winship),<br/>
1254 xmllint should not load DTD by default when using the reader (Daniel,<br/>
1256 Try IBM-037 when looking for EBCDIC handlers (Petr Sumbera),<br/>
1257 Fix potential out of bound access (Daniel Veillard),<br/>
1258 Fix large parse of file from memory (Daniel Veillard),<br/>
1259 Fix a bug in the nsclean option of the parser (Daniel Veillard),<br/>
1260 Fix a regression in 2.9.0 breaking validation while streaming (Daniel,<br/>
1262 Remove potential calls to exit() (Daniel Veillard)<br/>
1265 <li> Improvements:<br/>
1266 Regenerated API, and testapi, rebuild documentation (Daniel Veillard),<br/>
1267 Fix tree iterators broken by 2to3 script (Daniel Veillard),<br/>
1268 update all tests for Python3 and Python2 (Daniel Veillard),<br/>
1269 A few more fixes for python 3 affecting libxml2.py (Daniel Veillard),<br/>
1270 Fix compilation on Python3 (Daniel Veillard),<br/>
1271 Converting apibuild.py to python3 (Daniel Veillard),<br/>
1272 First pass at starting porting to python3 (Daniel Veillard),<br/>
1273 updated configure.in for python3 (Daniel Veillard),<br/>
1274 Add support for xpathRegisterVariable in Python (Shaun McCance),<br/>
1275 Added a regression tests from bug 694228 data (Daniel Veillard),<br/>
1276 Cache presence of '<' in entities content (Daniel Veillard),<br/>
1277 Avoid extra processing on entities (Daniel Veillard),<br/>
1278 Python binding for xmlRegisterInputCallback (Alexey Neyman),<br/>
1279 Python bindings: DOM casts everything to xmlNode (Alexey Neyman),<br/>
1280 Define LIBXML_THREAD_ALLOC_ENABLED via xmlversion.h (Tim Starling),<br/>
1281 Adding streaming validation to runtest checks (Daniel Veillard),<br/>
1282 Add a --pushsmall option to xmllint (Daniel Veillard)<br/>
1286 Switched comment in file to UTF-8 encoding (Daniel Veillard),<br/>
1287 Extend gitignore (Daniel Veillard),<br/>
1288 Silent the new python test on input (Alexey Neyman),<br/>
1289 Cleanup of a duplicate test (Daniel Veillard),<br/>
1290 Cleanup on duplicate test expressions (Daniel Veillard),<br/>
1291 Fix compiler warning after 153cf15905cf4ec080612ada6703757d10caba1e (Patrick,<br/>
1293 Spec cleanups and a fix for multiarch support (Daniel Veillard),<br/>
1294 Silence a clang warning (Daniel Veillard),<br/>
1295 Cleanup the Copyright to be pure MIT Licence wording (Daniel Veillard),<br/>
1296 rand_seed should be static in dict.c (Wouter Van Rooy),<br/>
1297 Fix typos in parser comments (Jan Pokorný)<br/>
1300 <h3>2.9.0: Sep 11 2012</h3>
1303 A few new API entry points,<br/>
1304 More resilient push parser mode,<br/>
1305 A lot of portability improvement,<br/>
1306 Faster XPath evaluation<br/>
1309 <li> Documentation:<br/>
1310 xml2-config.1 markup error (Christian Weisgerber),<br/>
1311 libxml(3) manpage typo fix (John Bradshaw),<br/>
1312 More cleanups to the documentation part of libxml2 (Daniel Richard G)<br/>
1315 <li> Portability:<br/>
1316 Bug 676544 - fails to build with --without-sax1 (Akira TAGOH),<br/>
1317 fix builds not having stdint.h (Rob Richards),<br/>
1318 GetProcAddressA is available only on WinCE (Daniel Veillard),<br/>
1319 More updates and cleanups on autotools and Makefiles (Daniel Richard G),<br/>
1320 More changes for Win32 compilation (Eric Zurcher),<br/>
1321 Basic changes for Win32 builds of release 2.9.0: compile buf.c (Eric Zurcher),<br/>
1322 Bundles all generated files for python into the distribution (Daniel Richard G),<br/>
1323 Fix compiler warnings of wincecompat.c (Patrick Gansterer),<br/>
1324 Fix non __GNUC__ build (Patrick Gansterer),<br/>
1325 Fix windows unicode build (Patrick Gansterer),<br/>
1326 clean redefinition of {v}snprintf in C-source (Roumen Petrov),<br/>
1327 use xmlBuf... if DEBUG_INPUT is defined (Roumen Petrov),<br/>
1328 fix runtests to use pthreads support for various Unix platforms (Daniel Richard G),<br/>
1329 Various "make distcheck" and portability fixups 2nd part (Daniel Richard G),<br/>
1330 Various "make distcheck" and portability fixups (Daniel Richard G),<br/>
1331 Fix compilation on older Visual Studio (Daniel Veillard)<br/>
1334 <li> Bug Fixes:<br/>
1335 Change the XPath code to percolate allocation errors (Daniel Veillard),<br/>
1336 Fix reuse of xmlInitParser (Daniel Veillard),<br/>
1337 Fix potential crash on entities errors (Daniel Veillard),<br/>
1338 initialize var (Rob Richards),<br/>
1339 Fix the XPath arity check to also check the XPath stack limits (Daniel Veillard),<br/>
1340 Fix problem with specific and generic error handlers (Pietro Cerutti),<br/>
1341 Avoid a potential infinite recursion (Daniel Veillard),<br/>
1342 Fix an XSD error when generating internal automata (Daniel Veillard),<br/>
1343 Patch for xinclude of text using multibyte characters (Vitaly Ostanin),<br/>
1344 Fix a segfault on XSD validation on pattern error (Daniel Veillard),<br/>
1345 Fix missing xmlsave.h module which was ignored in recent builds (Daniel Veillard),<br/>
1346 Add a missing element check (Daniel Veillard),<br/>
1347 Adding various checks on node type though the API (Daniel Veillard),<br/>
1348 Namespace nodes can't be unlinked with xmlUnlinkNode (Daniel Veillard),<br/>
1349 Fix make dist to include new private header files (Daniel Veillard),<br/>
1350 More fixups on the push parser behaviour (Daniel Veillard),<br/>
1351 Strengthen behaviour of the push parser in problematic situations (Daniel Veillard),<br/>
1352 Enforce XML_PARSER_EOF state handling through the parser (Daniel Veillard),<br/>
1353 Fixup limits parser (Daniel Veillard),<br/>
1354 Do not fetch external parsed entities (Daniel Veillard),<br/>
1355 Fix an error in previous commit (Aron Xu),<br/>
1356 Fix entities local buffers size problems (Daniel Veillard),<br/>
1357 Fix parser local buffers size problems (Daniel Veillard),<br/>
1358 Fix a failure to report xmlreader parsing failures (Daniel Veillard)<br/>
1361 <li> Improvements:<br/>
1362 Keep libxml2.syms when running "make distclean" (Daniel Veillard),<br/>
1363 Allow to set the quoting character of an xmlWriter (Csaba Raduly),<br/>
1364 Keep non-significant blanks node in HTML parser (Daniel Veillard),<br/>
1365 Add a forbidden variable error number and message to XPath (Daniel Veillard),<br/>
1366 Support long path names on WNT (Michael Stahl),<br/>
1367 Improve HTML escaping of attribute on output (Daniel Veillard),<br/>
1368 Handle ICU_LIBS as LIBADD, not LDFLAGS to prevent linking errors (Arfrever Frehtes Taifersar Arahesis),<br/>
1369 Switching XPath node sorting to Timsort (Vojtech Fried),<br/>
1370 Optimizing '//' in XPath expressions (Nick Wellnhofer),<br/>
1371 Expose xmlBufShrink in the public tree API (Daniel Veillard),<br/>
1372 Visible HTML elements close the head tag (Conrad Irwin),<br/>
1373 Fix file and line report for XSD SAX and reader streaming validation (Daniel Veillard),<br/>
1374 Fix const qualifyer to definition of xmlBufferDetach (Daniel Veillard),<br/>
1375 minimize use of HAVE_CONFIG_H (Roumen Petrov),<br/>
1376 fixup regression in Various "make distcheck" and portability fixups (Roumen Petrov),<br/>
1377 Add support for big line numbers in error reporting (Daniel Veillard),<br/>
1378 Avoid using xmlBuffer for serialization (Daniel Veillard),<br/>
1379 Improve compatibility between xmlBuf and xmlBuffer (Daniel Veillard),<br/>
1380 Provide new accessors for xmlOutputBuffer (Daniel Veillard),<br/>
1381 Improvements for old buffer compatibility (Daniel Veillard),<br/>
1382 Expand the limit test program (Daniel Veillard),<br/>
1383 Improve error reporting on parser errors (Daniel Veillard),<br/>
1384 Implement some default limits in the XPath module (Daniel Veillard),<br/>
1385 Introduce some default parser limits (Daniel Veillard),<br/>
1386 Cleanups and new limit APIs for dictionaries (Daniel Veillard),<br/>
1387 Fixup for buf.c (Daniel Veillard),<br/>
1388 Cleanup URI module memory allocation code (Daniel Veillard),<br/>
1389 Extend testlimits (Daniel Veillard),<br/>
1390 More avoid quadratic behaviour (Daniel Veillard),<br/>
1391 Impose a reasonable limit on PI size (Daniel Veillard),<br/>
1392 first version of testlimits new test (Daniel Veillard),<br/>
1393 Avoid quadratic behaviour in some push parsing cases (Daniel Veillard),<br/>
1394 Impose a reasonable limit on comment size (Daniel Veillard),<br/>
1395 Impose a reasonable limit on attribute size (Daniel Veillard),<br/>
1396 Harden the buffer code and make it more compatible (Daniel Veillard),<br/>
1397 More cleanups for input/buffers code (Daniel Veillard),<br/>
1398 Cleanup function xmlBufResetInput(),<br/> to set input from Buffer (Daniel Veillard)
1399 Swicth the test program for characters to new input buffers (Daniel Veillard),<br/>
1400 Convert the HTML tree module to the new buffers (Daniel Veillard),<br/>
1401 Convert of the HTML parser to new input buffers (Daniel Veillard),<br/>
1402 Convert the writer to new output buffer and save APIs (Daniel Veillard),<br/>
1403 Convert XMLReader to the new input buffers (Daniel Veillard),<br/>
1404 New saving functions using xmlBuf and conversion (Daniel Veillard),<br/>
1405 Provide new xmlBuf based saving functions (Daniel Veillard),<br/>
1406 Convert XInclude to the new input buffers (Daniel Veillard),<br/>
1407 Convert catalog code to the new input buffers (Daniel Veillard),<br/>
1408 Convert C14N to the new Input buffer (Daniel Veillard),<br/>
1409 Convert xmlIO.c to the new input and output buffers (Daniel Veillard),<br/>
1410 Convert XML parser to the new input buffers (Daniel Veillard),<br/>
1411 Incompatible change to the Input and Output buffers (Daniel Veillard),<br/>
1412 Adding new encoding function to deal with the new structures (Daniel Veillard),<br/>
1413 Convert XPath to xmlBuf (Daniel Veillard),<br/>
1414 Adding a new buf module for buffers (Daniel Veillard),<br/>
1415 Memory error within SAX2 reuse common framework (Daniel Veillard),<br/>
1416 Fix xmllint --xpath node initialization (Daniel Veillard)<br/>
1420 Various cleanups to avoid compiler warnings (Daniel Veillard),<br/>
1421 Big space and tab cleanup (Daniel Veillard),<br/>
1422 Followup to LibXML2 docs/examples cleanup patch (Daniel Veillard),<br/>
1423 Second round of cleanups for LibXML2 docs/examples (Daniel Richard),<br/>
1424 Remove all .cvsignore as they are not used anymore (Daniel Veillard),<br/>
1425 Fix a Timsort function helper comment (Daniel Veillard),<br/>
1426 Small cleanup for valgrind target (Daniel Veillard),<br/>
1427 Patch for portability of latin characters in C files (Daniel Veillard),<br/>
1428 Cleanup some of the parser code (Daniel Veillard),<br/>
1429 Fix a variable name in comment (Daniel Veillard),<br/>
1430 Regenerated testapi.c (Daniel Veillard),<br/>
1431 Regenerating docs and API files (Daniel Veillard),<br/>
1432 Small cleanup of unused variables in test (Daniel Veillard),<br/>
1433 Expand .gitignore with more files (Daniel Veillard)<br/>
1436 <h3>2.8.0: May 23 2012</h3>
1439 add lzma compression support (Anders F Bjorklund)
1443 xmlcatalog: Add uri and delegateURI to possible add types in man page. (Ville Skyttä),
1444 Update README.tests (Daniel Veillard),
1445 URI handling code is not OOM resilient (Daniel Veillard),
1446 Fix an error in comment (Daniel Veillard),
1447 Fixed bug #617016 (Daniel Mustieles),
1448 Fixed two typos in the README document (Daniel Neel),
1449 add generated html files (Anders F Bjorklund),
1450 Clarify the need to use xmlFreeNode after xmlUnlinkNode (Daniel Veillard),
1451 Improve documentation a bit (Daniel Veillard),
1452 Updated URL for lxml python bindings (Daniel Veillard)
1456 Restore code for Windows compilation (Daniel Veillard),
1457 Remove git error message during configure (Christian Dywan),
1458 xmllint: Build fix for endTimer if !defined(HAVE_GETTIMEOFDAY) (Patrick R. Gansterer),
1459 remove a bashism in confgure.in (John Hein),
1460 undef ERROR if already defined (Patrick R. Gansterer),
1461 Fix library problems with mingw-w64 (Michael Cronenworth),
1462 fix windows build. ifdef addition from bug 666491 makes no sense (Rob Richards),
1463 prefer native threads on win32 (Sam Thursfield),
1464 Allow to compile with Visual Studio 2010 (Thomas Lemm),
1465 Fix mingw's snprintf configure check (Andoni Morales),
1466 fixed a 64bit big endian issue (Marcus Meissner),
1467 Fix portability failure if netdb.h lacks NO_ADDRESS (Daniel Veillard),
1468 Fix windows build from lzma addition (Rob Richards),
1469 autogen: Only check for libtoolize (Colin Walters),
1470 Fix the Windows build files (Patrick von Reth),
1471 634846 Remove a linking option breaking Windows VC10 (Daniel Veillard),
1472 599241 fix an initialization problem on Win64 (Andrew W. Nosenko),
1473 fix win build (Rob Richards)
1477 Part for rand_r checking missing (Daniel Veillard),
1478 Cleanup on randomization (Daniel Veillard),
1479 Fix undefined reference in python module (Pacho Ramos),
1480 Fix a race in xmlNewInputStream (Daniel Veillard),
1481 Fix weird streaming RelaxNG errors (Noam),
1482 Fix various bugs in new code raised by the API checking (Daniel Veillard),
1483 Fix various problems with "make dist" (Daniel Veillard),
1484 Fix a memory leak in the xzlib code (Daniel Veillard),
1485 HTML parser error with <noscript> in the <head> (Denis Pauk),
1486 XSD: optional element in complex type extension (Remi Gacogne),
1487 Fix html serialization error and htmlSetMetaEncoding() (Daniel Veillard),
1488 Fix a wrong return value in previous patch (Daniel Veillard),
1489 Fix an uninitialized variable use (Daniel Veillard),
1490 Fix a compilation problem with --minimum (Brandon Slack),
1491 Remove redundant and ungarded include of resolv.h (Daniel Veillard),
1492 xinclude with parse="text" does not use the entity loader (Shaun McCance),
1493 Allow to parse 1 byte HTML files (Denis Pauk),
1494 Patch that fixes the skipping of the HTML_PARSE_NOIMPLIED flag (Martin Schröder),
1495 Avoid memory leak if xmlParserInputBufferCreateIO fails (Lin Yi-Li),
1496 Prevent an infinite loop when dumping a node with encoding problems (Timothy Elliott),
1497 xmlParseNodeInContext problems with an empty document (Tim Elliott),
1498 HTML element position is not detected propperly (Pavel Andrejs),
1499 Fix an off by one pointer access (Jüri Aedla),
1500 Try to fix a problem with entities in SAX mode (Daniel Veillard),
1501 Fix a crash with xmllint --path on empty results (Daniel Veillard),
1502 Fixed bug #667946 (Daniel Mustieles),
1503 Fix a logic error in Schemas Component Constraints (Ryan Sleevi),
1504 Fix a wrong enum type use in Schemas Types (Nico Weber),
1505 Fix SAX2 builder in case of undefined attributes namespace (Daniel Veillard),
1506 Fix SAX2 builder in case of undefined element namespaces (Daniel Veillard),
1507 fix reference to STDOUT_FILENO on MSVC (Tay Ray Chuan),
1508 fix a pair of possible out of array char references (Daniel Veillard),
1509 Fix an allocation error when copying entities (Daniel Veillard),
1510 Make sure the parser returns when getting a Stop order (Chris Evans),
1511 Fix some potential problems on reallocation failures(parser.c) (Xia Xinfeng),
1512 Fix a schema type duration comparison overflow (Daniel Veillard),
1513 Fix an unimplemented part in RNG value validation (Daniel Veillard),
1514 Fix missing error status in XPath evaluation (Daniel Veillard),
1515 Hardening of XPath evaluation (Daniel Veillard),
1516 Fix an off by one error in encoding (Daniel Veillard),
1517 Fix RELAX NG include bug #655288 (Shaun McCance),
1518 Fix XSD validation bug #630130 (Toyoda Eizi),
1519 Fix some potential problems on reallocation failures (Chris Evans),
1520 __xmlRaiseError: fix use of the structured callback channel (Dmitry V. Levin),
1521 __xmlRaiseError: fix the structured callback channel's data initialization (Dmitry V. Levin),
1522 Fix memory corruption when xmlParseBalancedChunkMemoryInternal is called from xmlParseBalancedChunk (Rob Richards),
1523 Small fix for previous commit (Daniel Veillard),
1524 Fix a potential freeing error in XPath (Daniel Veillard),
1525 Fix a potential memory access error (Daniel Veillard),
1526 Reactivate the shared library versionning script (Daniel Veillard)
1530 use mingw C99 compatible functions {v}snprintf instead those from MSVC runtime (Roumen Petrov),
1531 New symbols added for the next release (Daniel Veillard),
1532 xmlTextReader bails too quickly on error (Andy Lutomirski),
1533 Use a hybrid allocation scheme in xmlNodeSetContent (Conrad Irwin),
1534 Use buffers when constructing string node lists. (Conrad Irwin),
1535 Add HTML parser support for HTML5 meta charset encoding declaration (Denis Pauk),
1536 wrong message for double hyphen in comment XML error (Bryan Henderson),
1537 Fix "make tst" to grab lzma lib too (Daniel Veillard),
1538 Add "whereis" command to xmllint shell (Ryan),
1539 Improve xmllint shell (Ryan),
1540 add function xmlTextReaderRelaxNGValidateCtxt() (Noam Postavsky),
1541 Add --system support to autogen.sh (Daniel Veillard),
1542 Add hash randomization to hash and dict structures (Daniel Veillard),
1543 included xzlib in dist (Anders F Bjorklund),
1544 move xz/lzma helpers to separate included files (Anders F Bjorklund),
1545 add generated devhelp files (Anders F Bjorklund),
1546 add XML_WITH_LZMA to api (Anders F Bjorklund),
1547 autogen.sh: Honor NOCONFIGURE environment variable (Colin Walters),
1548 Improve the error report on undefined REFs (Daniel Veillard),
1549 Add exception for new W3C PI xml-model (Daniel Veillard),
1550 Add options to ignore the internal encoding (Daniel Veillard),
1551 testapi: use the right type for the check (Stefan Kost),
1552 various: handle return values of write calls (Stefan Kost),
1553 testWriter: xmlTextWriterWriteFormatElement wants an int instead of a long int (Stefan Kost),
1554 runxmlconf: update to latest testsuite version (Stefan Kost),
1555 configure: add -Wno-long-long to CFLAGS (Stefan Kost),
1556 configure: support silent automake rules if possible (Stefan Kost),
1557 xmlmemory: add a cast as size_t has no portable printf modifier (Stefan Kost),
1558 __xmlRaiseError: remove redundant schannel initialization (Dmitry V. Levin),
1559 __xmlRaiseError: do cheap code check early (Dmitry V. Levin)
1563 Cleanups before 2.8.0-rc2 (Daniel Veillard),
1564 Avoid an extra operation (Daniel Veillard),
1565 Remove vestigial de-ANSI-fication support. (Javier Jardón),
1566 autogen.sh: Fix typo (Javier Jardón),
1567 Do not use unsigned but unsigned int (Daniel Veillard),
1568 Remove two references to u_short (Daniel Veillard),
1569 Fix -Wempty-body warning from clang (Nico Weber),
1570 Cleanups of lzma support (Daniel Veillard),
1571 Augment the list of ignored files (Daniel Veillard),
1572 python: remove unused variable (Stefan Kost),
1573 python: flag two unused args (Stefan Kost),
1574 configure: acconfig.h is deprecated since autoconf-2.50 (Stefan Kost),
1575 xpath: remove unused variable (Stefan Kost)
1578 <h3>2.7.8: Nov 4 2010</h3>
1581 480323 add code to plug in ICU converters by default (Giuseppe Iuculano),
1582 Add xmlSaveOption XML_SAVE_WSNONSIG (Adam Spragg)
1585 Fix devhelp documentation installation (Mike Hommey),
1586 Fix web site encoding problems (Daniel Veillard),
1587 Fix a couple of typo in HTML parser error messages (Michael Day),
1588 Forgot to update the news page for 0.7.7 (Daniel Veillard)
1591 607273 Fix python detection on MSys/Windows (LRN),
1592 614087 Fix Socket API usage to allow Windows64 compilation (Ozkan Sezer),
1593 Fix compilation with Clang (Koop Mast),
1594 Fix Win32 build (Rob Richards)
1597 595789 fix a remaining potential Solaris problem (Daniel Veillard),
1598 617468 fix progressive HTML parsing with style using "'" (Denis Pauk),
1599 616478 Fix xmllint shell write command (Gwenn Kahz),
1600 614005 Possible erroneous HTML parsing on unterminated script (Pierre Belzile),
1601 627987 Fix XSD IDC errors in imported schemas (Jim Panetta),
1602 629325 XPath rounding errors first cleanup (Phil Shafer),
1603 630140 fix iso995x encoding error (Daniel Veillard),
1604 make sure htmlCtxtReset do reset the disableSAX field (Daniel Veillard),
1605 Fix a change of semantic on XPath preceding and following axis (Daniel Veillard),
1606 Fix a potential segfault due to weak symbols on pthreads (Mike Hommey),
1607 Fix a leak in XPath compilation (Daniel Veillard),
1608 Fix the semantic of XPath axis for namespace/attribute context nodes (Daniel Veillard),
1609 Avoid a descriptor leak in catalog loading code (Carlo Bramini),
1610 Fix a small bug in XPath evaluation code (Marius Wachtler),
1611 Fix handling of XML-1.0 XML namespace declaration (Daniel Veillard),
1612 Fix errors in XSD double validation check (Csaba Raduly),
1613 Fix handling of apos in URIs (Daniel Veillard),
1614 xmlTextReaderReadOuterXml should handle DTD (Rob Richards),
1615 Autogen.sh needs to create m4 directory (Rob Richards)
1618 606592 update language ID parser to RFC 5646 (Daniel Veillard),
1619 Sort python generated stubs (Mike Hommey),
1620 Add an HTML parser option to avoid a default doctype (Daniel Veillard)
1623 618831 don't ship generated files in git (Adrian Bunk),
1624 Switch from the obsolete mkinstalldirs to AC_PROG_MKDIR_P (Adrian Bunk),
1625 Various cleanups on encoding handling (Daniel Veillard),
1626 Fix xmllint to use format=1 for default formatting (Adam Spragg),
1627 Force _xmlSaveCtxt.format to be 0 or 1 (Adam Spragg),
1628 Cleanup encoding pointer comparison (Nikolay Sivov),
1629 Small code cleanup on previous patch (Daniel Veillard)
1632 <h3>2.7.7: Mar 15 2010</h3>
1635 Adding a --xpath option to xmllint (Daniel Veillard),
1636 Make HTML parser non-recursive (Eugene Pimenov)
1639 relaxng.c: cast to allow compilation with sun studio 11 (Ben Walton),
1640 Fix build failure on Sparc solaris (Roumen Petrov),
1641 use autoreconf in autogen.sh (Daniel Veillard),
1642 Fix build with mingw (Roumen Petrov),
1643 Upgrade some of the configure and autogen (Daniel Veillard),
1644 Fix relaxNG tests in runtest for Windows runtest.c: initialize ret (Rob Richards),
1645 Fix a const warning in xmlNodeSetBase (Martin Trappel),
1646 Fix python generator to not use deprecated xmllib (Daniel Veillard),
1647 Update some automake files (Daniel Veillard),
1648 598785 Fix nanohttp on Windows (spadix)
1651 libxml violates the zlib interface and crashes (Mark Adler),
1652 Fix broken escape behaviour in regexp ranges (Daniel Veillard),
1653 Fix missing win32 libraries in libxml-2.0.pc (Volker Grabsch),
1654 Fix detection of python linker flags (Daniel Macks),
1655 fix build error in libxml2/python (Paul Smith),
1656 ChunkParser: Incorrect decoding of small xml files (Raul Hudea),
1657 htmlCheckEncoding doesn't update input-end after shrink (Eugene Pimenov),
1658 Fix a missing #ifdef (Daniel Veillard),
1659 Fix encoding selection for xmlParseInNodeContext (Daniel Veillard),
1660 xmlPreviousElementSibling mistake (François Delyon),
1661 608773 add a missing check in xmlGROW (Daniel Veillard),
1662 Fix xmlParseInNodeContext for HTML content (Daniel Veillard),
1663 Fix lost namespace when copying node * tree.c: reconcile namespace if not found (Rob Richards),
1664 Fix some missing commas in HTML element lists (Eugene Pimenov),
1665 Correct variable type to unsigned (Nikolay Sivov),
1666 Recognize ID attribute in HTML without DOCTYPE (Daniel Veillard),
1667 Fix memory leak in xmlXPathEvalExpression() (Martin),
1668 Fix an init bug in global.c (Kai Henning),
1669 Fix xmlNodeSetBase() comment (Daniel Veillard),
1670 Fix broken escape behaviour in regexp ranges (Daniel Veillard),
1671 Don't give default HTML boolean attribute values in parser (Daniel Veillard),
1672 xmlCtxtResetLastError should reset ctxt-errNo (Daniel Veillard)
1675 Cleanup a couple of weirdness in HTML parser (Eugene Pimenov)
1678 <h3>2.7.6: Oct 6 2009</h3>
1681 Restore thread support in default configuration (Andrew W. Nosenko),
1682 URI with no path parsing problem (Daniel Veillard),
1683 Minor patch for conditional defines in threads.c (Eric Zurcher)
1686 <h3>2.7.5: Sep 24 2009</h3>
1689 Restore behavior of --with-threads without argument (Andrew W. Nosenko),
1690 Fix memory leak when doc is NULL (Rob Richards),
1691 595792 fixing a RelaxNG bug introduced in 2.7.4 (Daniel Veillard),
1692 Fix a Relaxng bug raised by libvirt test suite (Daniel Veillard),
1693 Fix a parsing problem with little data at startup (Daniel Veillard),
1694 link python module with python library (Frederic Crozat),
1695 594874 Forgot an fclose in xmllint (Daniel Veillard)
1698 Adding symbols.xml to EXTRA_DIST (Daniel Veillard)
1701 <h3>2.7.4: Sep 10 2009</h3>
1704 Switch to GIT (GNOME),
1705 Add symbol versioning to libxml2 shared libs (Daniel Veillard)
1708 593857 try to work around thread pbm MinGW 4.4 (Daniel Veillard),
1709 594250 rename ATTRIBUTE_ALLOC_SIZE to avoid clashes (Daniel Veillard),
1710 Fix Windows build * relaxng.c: fix windows build (Rob Richards),
1711 Fix the globals.h to use XMLPUBFUN (Paul Smith),
1712 Problem with extern extern in header (Daniel Veillard),
1713 Add -lnetwork for compiling on Haiku (Scott McCreary),
1714 Runtest portability patch for Solaris (Tim Rice),
1715 Small patch to accomodate the Haiku OS (Scott McCreary),
1716 584605 package VxWorks folder in the distribution (Daniel Veillard),
1717 574017 Realloc too expensive on most platform (Daniel Veillard),
1718 Fix windows build (Rob Richards),
1719 545579 doesn't compile without schema support (Daniel Veillard),
1720 xmllint use xmlGetNodePath when not compiled in (Daniel Veillard),
1721 Try to avoid __imp__xmlFree link trouble on msys (Daniel Veillard),
1722 Allow to select the threading system on Windows (LRN),
1723 Fix Solaris binary links, cleanups (Daniel Veillard),
1724 Bug 571059 â
\80\93 MSVC doesn't work with the bakefile (Intron),
1725 fix ATTRIBUTE_PRINTF header clash (Belgabor and Mike Hommey),
1726 fixes for Borland/CodeGear/Embarcadero compilers (Eric Zurcher)
1729 544910 typo: "renciliateNs" (Leonid Evdokimov),
1730 Add VxWorks to list of OSes (Daniel Veillard),
1731 Regenerate the documentation and update for git (Daniel Veillard),
1732 560524 ¿ xmlTextReaderLocalName description (Daniel Veillard),
1733 Added sponsoring by AOE media for the server (Daniel Veillard),
1734 updated URLs for GNOME (Vincent Lefevre),
1735 more warnings about xmlCleanupThreads and xmlCleanupParser (Daniel Veillard)
1738 594514 memory leaks - duplicate initialization (MOD),
1739 Wrong block opening in htmlNodeDumpOutputInternal (Daniel Veillard),
1740 492317 Fix Relax-NG validation problems (Daniel Veillard),
1741 558452 fight with reg test and error report (Daniel Veillard),
1742 558452 RNG compilation of optional multiple child (Daniel Veillard),
1743 579746 XSD validation not correct / nilable groups (Daniel Veillard),
1744 502960 provide namespace stack when parsing entity (Daniel Veillard),
1745 566012 part 2 fix regresion tests and push mode (Daniel Veillard),
1746 566012 autodetected encoding and encoding conflict (Daniel Veillard),
1747 584220 xpointer(/) and xinclude problems (Daniel Veillard),
1748 587663 Incorrect Attribute-Value Normalization (Daniel Veillard),
1749 444994 HTML chunked failure for attribute with <> (Daniel Veillard),
1750 Fix end of buffer char being split in XML parser (Daniel Veillard),
1751 Non ASCII character may be split at buffer end (Adiel Mittmann),
1752 440226 Add xmlXIncludeProcessTreeFlagsData API (Stefan Behnel),
1753 572129 speed up parsing of large HTML text nodes (Markus Kull),
1754 Fix HTML parsing with 0 character in CDATA (Daniel Veillard),
1755 Fix SetGenericErrorFunc and SetStructured clash (Wang Lam),
1756 566012 Incomplete EBCDIC parsing support (Martin Kogler),
1757 541335 HTML avoid creating 2 head or 2 body element (Daniel Veillard),
1758 541237 error correcting missing end tags in HTML (Daniel Veillard),
1759 583439 missing line numbers in push mode (Daniel Veillard),
1760 587867 xmllint --html --xmlout serializing as HTML (Daniel Veillard),
1761 559501 avoid select and use poll for nanohttp (Raphael Prevost),
1762 559410 - Regexp bug on (...)? constructs (Daniel Veillard),
1763 Fix a small problem on previous HTML parser patch (Daniel Veillard),
1764 592430 - HTML parser runs into endless loop (Daniel Veillard),
1765 447899 potential double free in xmlFreeTextReader (Daniel Veillard),
1766 446613 small validation bug mixed content with NS (Daniel Veillard),
1767 Fix the problem of revalidating a doc with RNG (Daniel Veillard),
1768 Fix xmlKeepBlanksDefault to not break indent (Nick Wellnhofer),
1769 512131 refs from externalRef part need to be added (Daniel Veillard),
1770 512131 crash in xmlRelaxNGValidateFullElement (Daniel Veillard),
1771 588441 allow '.' in HTML Names even if invalid (Daniel Veillard),
1772 582913 Fix htmlSetMetaEncoding() to be nicer (Daniel Veillard),
1773 579317 Try to find the HTML encoding information (Daniel Veillard),
1774 575875 don't output charset=html (Daniel Veillard),
1775 571271 fix semantic of xsd:all with minOccurs=0 (Daniel Veillard),
1776 570702 fix a bug in regexp determinism checking (Daniel Veillard),
1777 567619 xmlValidateNotationUse missing param test (Daniel Veillard),
1778 574393 ¿ utf-8 filename magic for compressed files (Hans Breuer),
1779 Fix a couple of problems in the parser (Daniel Veillard),
1780 585505 ¿ Document ids and refs populated by XSD (Wayne Jensen),
1781 582906 XSD validating multiple imports of the same schema (Jason Childs),
1782 Bug 582887 ¿ problems validating complex schemas (Jason Childs),
1783 Bug 579729 ¿ fix XSD schemas parsing crash (Miroslav Bajtos),
1784 576368 ¿ htmlChunkParser with special attributes (Jiri Netolicky),
1785 Bug 565747 ¿ relax anyURI data character checking (Vincent Lefevre),
1786 Preserve attributes of include start on tree copy (Petr Pajas),
1787 Skip silently unrecognized XPointer schemes (Jakub Wilk),
1788 Fix leak on SAX1, xmllint --sax1 option and debug (Daniel Veillard),
1789 potential NULL dereference on non-glibc (Jim Meyering),
1790 Fix an XSD validation crash (Daniel Veillard),
1791 Fix a regression in streaming entities support (Daniel Veillard),
1792 Fix a couple of ABI issues with C14N 1.1 (Aleksey Sanin),
1793 Aleksey Sanin support for c14n 1.1 (Aleksey Sanin),
1794 reader bug fix with entities (Daniel Veillard),
1795 use options from current parser ctxt for external entities (Rob Richards),
1796 581612 use %s to printf strings (Christian Persch),
1797 584605 change the threading initialization sequence (Igor Novoseltsev),
1798 580705 keep line numbers in HTML parser (Aaron Patterson),
1799 581803 broken HTML table attributes init (Roland Steiner),
1800 do not set error code in xmlNsWarn (Rob Richards),
1801 564217 fix structured error handling problems,
1802 reuse options from current parser for entities (Rob Richards),
1803 xmlXPathRegisterNs should not allow enpty prefixes (Daniel Veillard),
1804 add a missing check in xmlAddSibling (Kris Breuker),
1805 avoid leaks on errors (Jinmei Tatuya)
1808 Chasing dead assignments reported by clang-scan (Daniel Veillard),
1809 A few more safety cleanup raised by scan (Daniel Veillard),
1810 Fixing assorted potential problems raised by scan (Daniel Veillard),
1811 Potential uninitialized arguments raised by scan (Daniel Veillard),
1812 Fix a bunch of scan 'dead increments' and cleanup (Daniel Veillard),
1813 Remove a pedantic warning (Daniel Veillard),
1814 555833 always use rm -f in uninstall-local (Daniel Veillard),
1815 542394 xmlRegisterOutputCallbacks MAX_INPUT_CALLBACK (Daniel Veillard),
1816 Autoregenerate libxml2.syms automated checkings (Daniel Veillard),
1817 Make xmlRecoverDoc const (Martin Trappel) (Daniel Veillard),
1818 Both args of xmlStrcasestr are const (Daniel Veillard),
1819 hide the nbParse* variables used for debugging (Mike Hommey),
1820 570806 changed include of config.h (William M. Brack),
1821 cleanups and error reports when xmlTextWriterVSprintf fails (Jinmei Tatuya)
1824 <h3>2.7.3: Jan 18 2009</h3>
1826 <li>Build fix: fix build when HTML support is not included.</li>
1827 <li>Bug fixes: avoid memory overflow in gigantic text nodes,
1828 indentation problem on the writed (Rob Richards),
1829 xmlAddChildList pointer problem (Rob Richards and Kevin Milburn),
1830 xmlAddChild problem with attribute (Rob Richards and Kris Breuker),
1831 avoid a memory leak in an edge case (Daniel Zimmermann),
1832 deallocate some pthread data (Alex Ott).</li>
1833 <li>Improvements: configure option to avoid rebuilding docs (Adrian Bunk),
1834 limit text nodes to 10MB max by default, add element traversal
1835 APIs, add a parser option to enable pre 2.7 SAX behavior (Rob Richards),
1836 add gcc malloc checking (Marcus Meissner), add gcc printf like functions
1837 parameters checking (Marcus Meissner).</li>
1839 <h3>2.7.2: Oct 3 2008</h3>
1841 <li>Portability fix: fix solaris compilation problem, fix compilation
1842 if XPath is not configured in</li>
1843 <li>Bug fixes: nasty entity bug introduced in 2.7.0, restore old behaviour
1844 when saving an HTML doc with an xml dump function, HTML UTF-8 parsing
1845 bug, fix reader custom error handlers (Riccardo Scussat)
1846 <li>Improvement: xmlSave options for more flexibility to save as
1847 XML/HTML/XHTML, handle leading BOM in HTML documents</li>
1850 <h3>2.7.1: Sep 1 2008</h3>
1852 <li>Portability fix: Borland C fix (Moritz Both)</li>
1853 <li>Bug fixes: python serialization wrappers, XPath QName corner
1854 case handking and leaks (Martin)</li>
1855 <li>Improvement: extend the xmlSave to handle HTML documents and trees</li>
1856 <li>Cleanup: python serialization wrappers</li>
1859 <h3>2.7.0: Aug 30 2008</h3>
1861 <li>Documentation: switch ChangeLog to UTF-8, improve mutithreads and
1862 xmlParserCleanup docs</li>
1863 <li>Portability fixes: Older Win32 platforms (Rob Richards), MSVC
1864 porting fix (Rob Richards), Mac OS X regression tests (Sven Herzberg),
1865 non GNUCC builds (Rob Richards), compilation on Haiku (Andreas Färber)
1867 <li>Bug fixes: various realloc problems (Ashwin), potential double-free
1868 (Ashwin), regexp crash, icrash with invalid whitespace facets (Rob
1869 Richards), pattern fix when streaming (William Brack), various XML
1870 parsing and validation fixes based on the W3C regression tests, reader
1871 tree skipping function fix (Ashwin), Schemas regexps escaping fix
1872 (Volker Grabsch), handling of entity push errors (Ashwin), fix a slowdown
1873 when encoder cant serialize characters on output</li>
1874 <li>Code cleanup: compilation fix without the reader, without the output
1875 (Robert Schwebel), python whitespace (Martin), many space/tabs cleanups,
1876 serious cleanup of the entity handling code</li>
1877 <li>Improvement: switch parser to XML-1.0 5th edition, add parsing flags
1878 for old versions, switch URI parsing to RFC 3986,
1879 add xmlSchemaValidCtxtGetParserCtxt (Holger Kaelberer),
1880 new hashing functions for dictionnaries (based on Stefan Behnel work),
1881 improve handling of misplaced html/head/body in HTML parser, better
1882 regression test tools and code coverage display, better algorithms
1883 to detect various versions of the billion laughts attacks, make
1884 arbitrary parser limits avoidable as a parser option</li>
1886 <h3>2.6.32: Apr 8 2008</h3>
1888 <li>Documentation: returning heap memory to kernel (Wolfram Sang),
1889 trying to clarify xmlCleanupParser() use, xmlXPathContext improvement
1890 (Jack Jansen), improve the *Recover* functions documentation,
1891 XmlNodeType doc link fix (Martijn Arts)</li>
1892 <li>Bug fixes: internal subset memory leak (Ashwin), avoid problem with
1893 paths starting with // (Petr Sumbera), streaming XSD validation callback
1894 patches (Ashwin), fix redirection on port other than 80 (William Brack),
1895 SAX2 leak (Ashwin), XInclude fragment of own document (Chris Ryan),
1896 regexp bug with '.' (Andrew Tosh), flush the writer at the end of the
1897 document (Alfred Mickautsch), output I/O bug fix (William Brack),
1898 writer CDATA output after a text node (Alex Khesin), UTF-16 encoding
1899 detection (William Brack), fix handling of empty CDATA nodes for Safari
1900 team, python binding problem with namespace nodes, improve HTML parsing
1901 (Arnold Hendriks), regexp automata build bug, memory leak fix (Vasily
1902 Chekalkin), XSD test crash, weird system parameter entity parsing problem,
1903 allow save to file:///X:/ windows paths, various attribute normalisation
1904 problems, externalSubsetSplit fix (Ashwin), attribute redefinition in
1905 the DTD (Ashwin), fix in char ref parsing check (Alex Khesin), many
1906 out of memory handling fixes (Ashwin), XPath out of memory handling fixes
1907 (Alvaro Herrera), various realloc problems (Ashwin), UCS4 encoding
1908 conversion buffer size (Christian Fruth), problems with EatName
1909 functions on memory errors, BOM handling in external parsed entities
1911 <li>Code cleanup: fix build under VS 2008 (David Wimsey), remove useless
1912 mutex in xmlDict (Florent Guilian), Mingw32 compilation fix (Carlo
1913 Bramini), Win and MacOS EOL cleanups (Florent Guiliani), iconv need
1914 a const detection (Roumen Petrov), simplify xmlSetProp (Julien Charbon),
1915 cross compilation fixes for Mingw (Roumen Petrov), SCO Openserver build
1916 fix (Florent Guiliani), iconv uses const on Win32 (Rob Richards),
1917 duplicate code removal (Ashwin), missing malloc test and error reports
1918 (Ashwin), VMS makefile fix (Tycho Hilhorst)</li>
1919 <li>improvements: better plug of schematron in the normal error handling
1920 (Tobias Minich)</li>
1923 <h3>2.6.31: Jan 11 2008</h3>
1925 <li>Security fix: missing of checks in UTF-8 parsing</li>
1926 <li>Bug fixes: regexp bug, dump attribute from XHTML document, fix
1927 xmlFree(NULL) to not crash in debug mode, Schematron parsing crash
1928 (Rob Richards), global lock free on Windows (Marc-Antoine Ruel),
1929 XSD crash due to double free (Rob Richards), indentation fix in
1930 xmlTextWriterFullEndElement (Felipe Pena), error in attribute type
1931 parsing if attribute redeclared, avoid crash in hash list scanner if
1932 deleting elements, column counter bug fix (Christian Schmidt),
1933 HTML embed element saving fix (Stefan Behnel), avoid -L/usr/lib
1934 output from xml2-config (Fred Crozat), avoid an xmllint crash
1935 (Stefan Kost), don't stop HTML parsing on out of range chars.
1937 <li>Code cleanup: fix open() call third argument, regexp cut'n paste
1938 copy error, unused variable in __xmlGlobalInitMutexLock (Hannes Eder),
1939 some make distcheck realted fixes (John Carr)</li>
1940 <li>Improvements: HTTP Header: includes port number (William Brack),
1941 testURI --debug option, </li>
1943 <h3>2.6.30: Aug 23 2007</h3>
1945 <li>Portability: Solaris crash on error handling, windows path fixes
1946 (Roland Schwarz and Rob Richards), mingw build (Roland Schwarz)</li>
1947 <li>Bugfixes: xmlXPathNodeSetSort problem (William Brack), leak when
1948 reusing a writer for a new document (Dodji Seketeli), Schemas
1949 xsi:nil handling patch (Frank Gross), relative URI build problem
1950 (Patrik Fimml), crash in xmlDocFormatDump, invalid char in comment
1951 detection bug, fix disparity with xmlSAXUserParseMemory, automata
1952 generation for complex regexp counts problems, Schemas IDC import
1953 problems (Frank Gross), xpath predicate evailation error handling
1954 (William Brack)</li>
1956 <h3>2.6.29: Jun 12 2007</h3>
1958 <li>Portability: patches from Andreas Stricke for WinCEi,
1959 fix compilation warnings (William Brack), avoid warnings on Apple OS/X
1960 (Wendy Doyle and Mark Rowe), Windows compilation and threading
1961 improvements (Rob Richards), compilation against old Python versions,
1962 new GNU tar changes (Ryan Hill)</li>
1963 <li>Documentation: xmlURIUnescapeString comment, </li>
1964 <li>Bugfixes: xmlBufferAdd problem (Richard Jones), 'make valgrind'
1965 flag fix (Richard Jones), regexp interpretation of \,
1966 htmlCreateDocParserCtxt (Jean-Daniel Dupas), configure.in
1967 typo (Bjorn Reese), entity content failure, xmlListAppend() fix
1968 (Georges-André Silber), XPath number serialization (William Brack),
1969 nanohttp gzipped stream fix (William Brack and Alex Cornejo),
1970 xmlCharEncFirstLine typo (Mark Rowe), uri bug (François Delyon),
1971 XPath string value of PI nodes (William Brack), XPath node set
1972 sorting bugs (William Brack), avoid outputting namespace decl
1973 dups in the writer (Rob Richards), xmlCtxtReset bug, UTF-8 encoding
1974 error handling, recustion on next in catalogs, fix a Relax-NG crash,
1975 workaround wrong file: URIs, htmlNodeDumpFormatOutput on attributes,
1976 invalid character in attribute detection bug, big comments before
1977 internal subset streaming bug, HTML parsing of attributes with : in
1978 the name, IDness of name in HTML (Dagfinn I. Mannsåker) </li>
1979 <li>Improvement: keep URI query parts in raw form (Richard Jones),
1980 embed tag support in HTML (Michael Day) </li>
1983 <h3>2.6.28: Apr 17 2007</h3>
1985 <li>Documentation: comment fixes (Markus Keim), xpath comments fixes too
1986 (James Dennett)</li>
1987 <li>Bug fixes: XPath bug (William Brack), HTML parser autoclose stack usage
1988 (Usamah Malik), various regexp bug fixes (DV and William), path conversion
1989 on Windows (Igor Zlatkovic), htmlCtxtReset fix (Michael Day), XPath
1990 principal node of axis bug, HTML serialization of some codepoint
1991 (Steven Rainwater), user data propagation in XInclude (Michael Day),
1992 standalone and XML decl detection (Michael Day), Python id ouptut
1993 for some id, fix the big python string memory leak, URI parsing fixes
1994 (Stéphane Bidoul and William), long comments parsing bug (William),
1995 concurrent threads initialization (Ted Phelps), invalid char
1996 in text XInclude (William), XPath memory leak (William), tab in
1997 python problems (Andreas Hanke), XPath node comparison error
1998 (Oleg Paraschenko), cleanup patch for reader (Julien Reichel),
1999 XML Schemas attribute group (William), HTML parsing problem (William),
2000 fix char 0x2d in regexps (William), regexp quantifier range with
2001 min occurs of 0 (William), HTML script/style parsing (Mike Day)</li>
2002 <li>Improvement: make xmlTextReaderSetup() public</li>
2003 <li>Compilation and postability: fix a missing include problem (William),
2004 __ss_familly on AIX again (Björn Wiberg), compilation without zlib
2005 (Michael Day), catalog patch for Win32 (Christian Ehrlicher),
2006 Windows CE fixes (Andreas Stricke)</li>
2007 <li>Various CVS to SVN infrastructure changes</li>
2009 <h3>2.6.27: Oct 25 2006</h3>
2011 <li>Portability fixes: file names on windows (Roland Schwingel,
2012 Emelyanov Alexey), windows compile fixup (Rob Richards),
2013 AIX iconv() is apparently case sensitive</li>
2014 <li>improvements: Python XPath types mapping (Nic Ferrier), XPath optimization
2015 (Kasimier), add xmlXPathCompiledEvalToBoolean (Kasimier), Python node
2016 equality and comparison (Andreas Pakulat), xmlXPathCollectAndTest
2017 improvememt (Kasimier), expose if library was compiled with zlib
2018 support (Andrew Nosenko), cache for xmlSchemaIDCMatcher structs
2019 (Kasimier), xmlTextConcat should work with comments and PIs (Rob
2020 Richards), export htmlNewParserCtxt needed by Michael Day, refactoring
2021 of catalog entity loaders (Michael Day), add XPointer support to
2022 python bindings (Ross Reedstrom, Brian West and Stefan Anca),
2023 try to sort out most file path to URI conversions and xmlPathToUri,
2024 add --html --memory case to xmllint</li>
2025 <li>building fix: fix --with-minimum (Felipe Contreras), VMS fix,
2026 const'ification of HTML parser structures (Matthias Clasen),
2027 portability fix (Emelyanov Alexey), wget autodetection (Peter
2028 Breitenlohner), remove the build path recorded in the python
2029 shared module, separate library flags for shared and static builds
2030 (Mikhail Zabaluev), fix --with-minimum --with-sax1 builds, fix
2031 --with-minimum --with-schemas builds</li>
2032 <li>bug fix: xmlGetNodePath fix (Kasimier), xmlDOMWrapAdoptNode and
2033 attribute (Kasimier), crash when using the recover mode,
2034 xmlXPathEvalExpr problem (Kasimier), xmlXPathCompExprAdd bug (Kasimier),
2035 missing destry in xmlFreeRMutex (Andrew Nosenko), XML Schemas fixes
2036 (Kasimier), warning on entities processing, XHTML script and style
2037 serialization (Kasimier), python generator for long types, bug in
2038 xmlSchemaClearValidCtxt (Bertrand Fritsch), xmlSchemaXPathEvaluate
2039 allocation bug (Marton Illes), error message end of line (Rob Richards),
2040 fix attribute serialization in writer (Rob Richards), PHP4 DTD validation
2041 crasher, parser safety patch (Ben Darnell), _private context propagation
2042 when parsing entities (with Michael Day), fix entities behaviour when
2043 using SAX, URI to file path fix (Mikhail Zabaluev), disapearing validity
2044 context, arg error in SAX callback (Mike Hommey), fix mixed-content
2045 autodetect when using --noblanks, fix xmlIOParseDTD error handling,
2046 fix bug in xmlSplitQName on special Names, fix Relax-NG element content
2047 validation bug, fix xmlReconciliateNs bug, fix potential attribute
2048 XML parsing bug, fix line/column accounting in XML parser, chunking bug
2049 in the HTML parser on script, try to detect obviously buggy HTML
2050 meta encoding indications, bugs with encoding BOM and xmlSaveDoc,
2051 HTML entities in attributes parsing, HTML minimized attribute values,
2052 htmlReadDoc and htmlReadIO were broken, error handling bug in
2053 xmlXPathEvalExpression (Olaf Walkowiak), fix a problem in
2054 htmlCtxtUseOptions, xmlNewInputFromFile could leak (Marius Konitzer),
2055 bug on misformed SSD regexps (Christopher Boumenot)
2057 <li>documentation: warning about XML_PARSE_COMPACT (Kasimier Buchcik),
2058 fix xmlXPathCastToString documentation, improve man pages for
2059 xmllitn and xmlcatalog (Daniel Leidert), fixed comments of a few
2062 <h3>2.6.26: Jun 6 2006</h3>
2064 <li>portability fixes: Python detection (Joseph Sacco), compilation
2065 error(William Brack and Graham Bennett), LynxOS patch (Olli Savia)</li>
2066 <li>bug fixes: encoding buffer problem, mix of code and data in
2067 xmlIO.c(Kjartan Maraas), entities in XSD validation (Kasimier Buchcik),
2068 variousXSD validation fixes (Kasimier), memory leak in pattern (Rob
2069 Richards andKasimier), attribute with colon in name (Rob Richards), XPath
2070 leak inerror reporting (Aleksey Sanin), XInclude text include of
2072 <li>improvements: Xpath optimizations (Kasimier), XPath object
2073 cache(Kasimier)</li>
2076 <h3>2.6.25: Jun 6 2006:</h3>
2078 <p>Do not use or package 2.6.25</p>
2080 <h3>2.6.24: Apr 28 2006</h3>
2082 <li>Portability fixes: configure on Windows, testapi compile on windows
2083 (Kasimier Buchcik, venkat naidu), Borland C++ 6 compile (Eric Zurcher),
2084 HP-UX compiler workaround (Rick Jones), xml2-config bugfix, gcc-4.1
2085 cleanups, Python detection scheme (Joseph Sacco), UTF-8 file paths on
2086 Windows (Roland Schwingel).
2088 <li>Improvements: xmlDOMWrapReconcileNamespaces xmlDOMWrapCloneNode (Kasimier
2089 Buchcik), XML catalog debugging (Rick Jones), update to Unicode 4.01.</li>
2090 <li>Bug fixes: xmlParseChunk() problem in 2.6.23, xmlParseInNodeContext()
2091 on HTML docs, URI behaviour on Windows (Rob Richards), comment streaming
2092 bug, xmlParseComment (with William Brack), regexp bug fixes (DV &
2093 Youri Golovanov), xmlGetNodePath on text/CDATA (Kasimier),
2094 one Relax-NG interleave bug, xmllint --path and --valid,
2095 XSD bugfixes (Kasimier), remove debug
2096 left in Python bindings (Nic Ferrier), xmlCatalogAdd bug (Martin Cole),
2097 xmlSetProp fixes (Rob Richards), HTML IDness (Rob Richards), a large
2098 number of cleanups and small fixes based on Coverity reports, bug
2099 in character ranges, Unicode tables const (Aivars Kalvans), schemas
2100 fix (Stefan Kost), xmlRelaxNGParse error deallocation,
2101 xmlSchemaAddSchemaDoc error deallocation, error handling on unallowed
2102 code point, ixmllint --nonet to never reach the net (Gary Coady),
2103 line break in writer after end PI (Jason Viers). </li>
2104 <li>Documentation: man pages updates and cleanups (Daniel Leidert).</li>
2105 <li>New features: Relax NG structure error handlers.</li>
2108 <h3>2.6.23: Jan 5 2006</h3>
2110 <li>portability fixes: Windows (Rob Richards), getaddrinfo on Windows
2111 (Kolja Nowak, Rob Richards), icc warnings (Kjartan Maraas),
2112 --with-minimum compilation fixes (William Brack), error case handling fix
2113 on Solaris (Albert Chin), don't use 'list' as parameter name reported by
2114 Samuel Diaz Garcia, more old Unices portability fixes (Albert Chin),
2115 MinGW compilation (Mark Junker), HP-UX compiler warnings (Rick
2117 <li>code cleanup: xmlReportError (Adrian Mouat), remove xmlBufferClose
2118 (Geert Jansen), unreachable code (Oleksandr Kononenko), refactoring
2119 parsing code (Bjorn Reese)</li>
2120 <li>bug fixes: xmlBuildRelativeURI and empty path (William Brack),
2121 combinatory explosion and performances in regexp code, leak in
2122 xmlTextReaderReadString(), xmlStringLenDecodeEntities problem (Massimo
2123 Morara), Identity Constraints bugs and a segfault (Kasimier Buchcik),
2124 XPath pattern based evaluation bugs (DV & Kasimier),
2125 xmlSchemaContentModelDump() memory leak (Kasimier), potential leak in
2126 xmlSchemaCheckCSelectorXPath(), xmlTextWriterVSprintf() misuse of
2127 vsnprintf (William Brack), XHTML serialization fix (Rob Richards), CRLF
2128 split problem (William), issues with non-namespaced attributes in
2129 xmlAddChild() xmlAddNextSibling() and xmlAddPrevSibling() (Rob Richards),
2130 HTML parsing of script, Python must not output to stdout (Nic Ferrier),
2131 exclusive C14N namespace visibility (Aleksey Sanin), XSD dataype
2132 totalDigits bug (Kasimier Buchcik), error handling when writing to an
2133 xmlBuffer (Rob Richards), runtest schemas error not reported (Hisashi
2134 Fujinaka), signed/unsigned problem in date/time code (Albert Chin), fix
2135 XSI driven XSD validation (Kasimier), parsing of xs:decimal (Kasimier),
2136 fix DTD writer output (Rob Richards), leak in xmlTextReaderReadInnerXml
2137 (Gary Coady), regexp bug affecting schemas (Kasimier), configuration of
2138 runtime debugging (Kasimier), xmlNodeBufGetContent bug on entity refs
2139 (Oleksandr Kononenko), xmlRegExecPushString2 bug (Sreeni Nair),
2140 compilation and build fixes (Michael Day), removed dependancies on
2141 xmlSchemaValidError (Kasimier), bug with <xml:foo/>, more XPath
2142 pattern based evaluation fixes (Kasimier)</li>
2143 <li>improvements: XSD Schemas redefinitions/restrictions (Kasimier
2144 Buchcik), node copy checks and fix for attribute (Rob Richards), counted
2145 transition bug in regexps, ctxt->standalone = -2 to indicate no
2146 standalone attribute was found, add xmlSchemaSetParserStructuredErrors()
2147 (Kasimier Buchcik), add xmlTextReaderSchemaValidateCtxt() to API
2148 (Kasimier), handle gzipped HTTP resources (Gary Coady), add
2149 htmlDocDumpMemoryFormat. (Rob Richards),</li>
2150 <li>documentation: typo (Michael Day), libxml man page (Albert Chin), save
2151 function to XML buffer (Geert Jansen), small doc fix (Aron Stansvik),</li>
2154 <h3>2.6.22: Sep 12 2005</h3>
2156 <li>build fixes: compile without schematron (Stéphane Bidoul)</li>
2157 <li>bug fixes: xmlDebugDumpNode on namespace node (Oleg Paraschenko)i,
2158 CDATA push parser bug, xmlElemDump problem with XHTML1 doc,
2159 XML_FEATURE_xxx clash with expat headers renamed XML_WITH_xxx, fix some
2160 output formatting for meta element (Rob Richards), script and style
2161 XHTML1 serialization (David Madore), Attribute derivation fixups in XSD
2162 (Kasimier Buchcik), better IDC error reports (Kasimier Buchcik)</li>
2163 <li>improvements: add XML_SAVE_NO_EMPTY xmlSaveOption (Rob Richards), add
2164 XML_SAVE_NO_XHTML xmlSaveOption, XML Schemas improvements preparing for
2165 derive (Kasimier Buchcik).</li>
2166 <li>documentation: generation of gtk-doc like docs, integration with
2170 <h3>2.6.21: Sep 4 2005</h3>
2172 <li>build fixes: Cygwin portability fixes (Gerrit P. Haase), calling
2173 convention problems on Windows (Marcus Boerger), cleanups based on Linus'
2174 sparse tool, update of win32/configure.js (Rob Richards), remove warnings
2175 on Windows(Marcus Boerger), compilation without SAX1, detection of the
2176 Python binary, use $GCC inestad of $CC = 'gcc' (Andrew W. Nosenko),
2177 compilation/link with threads and old gcc, compile problem by C370 on
2179 <li>bug fixes: http_proxy environments (Peter Breitenlohner), HTML UTF-8
2180 bug (Jiri Netolicky), XPath NaN compare bug (William Brack),
2181 htmlParseScript potential bug, Schemas regexp handling of spaces, Base64
2182 Schemas comparisons NIST passes, automata build error xsd:all,
2183 xmlGetNodePath for namespaced attributes (Alexander Pohoyda), xmlSchemas
2184 foreign namespaces handling, XML Schemas facet comparison (Kupriyanov
2185 Anatolij), xmlSchemaPSimpleTypeErr error report (Kasimier Buchcik), xml:
2186 namespace ahndling in Schemas (Kasimier), empty model group in Schemas
2187 (Kasimier), wilcard in Schemas (Kasimier), URI composition (William),
2188 xs:anyType in Schemas (Kasimier), Python resolver emmitting error
2189 messages directly, Python xmlAttr.parent (Jakub Piotr Clapa), trying to
2190 fix the file path/URI conversion, xmlTextReaderGetAttribute fix (Rob
2191 Richards), xmlSchemaFreeAnnot memleak (Kasimier), HTML UTF-8
2192 serialization, streaming XPath, Schemas determinism detection problem,
2193 XInclude bug, Schemas context type (Dean Hill), validation fix (Derek
2194 Poon), xmlTextReaderGetAttribute[Ns] namespaces (Rob Richards), Schemas
2195 type fix (Kuba Nowakowski), UTF-8 parser bug, error in encoding handling,
2196 xmlGetLineNo fixes, bug on entities handling, entity name extraction in
2197 error handling with XInclude, text nodes in HTML body tags (Gary Coady),
2198 xml:id and IDness at the treee level fixes, XPath streaming patterns
2200 <li>improvements: structured interfaces for schemas and RNG error reports
2201 (Marcus Boerger), optimization of the char data inner loop parsing
2202 (thanks to Behdad Esfahbod for the idea), schematron validation though
2203 not finished yet, xmlSaveOption to omit XML declaration, keyref match
2204 error reports (Kasimier), formal expression handling code not plugged
2205 yet, more lax mode for the HTML parser, parser XML_PARSE_COMPACT option
2206 for text nodes allocation.</li>
2207 <li>documentation: xmllint man page had --nonet duplicated</li>
2210 <h3>2.6.20: Jul 10 2005</h3>
2212 <li>build fixes: Windows build (Rob Richards), Mingw compilation (Igor
2213 Zlatkovic), Windows Makefile (Igor), gcc warnings (Kasimier and
2214 andriy@google.com), use gcc weak references to pthread to avoid the
2215 pthread dependancy on Linux, compilation problem (Steve Nairn), compiling
2216 of subset (Morten Welinder), IPv6/ss_family compilation (William Brack),
2217 compilation when disabling parts of the library, standalone test
2219 <li>bug fixes: bug in lang(), memory cleanup on errors (William Brack),
2220 HTTP query strings (Aron Stansvik), memory leak in DTD (William), integer
2221 overflow in XPath (William), nanoftp buffer size, pattern "." apth fixup
2222 (Kasimier), leak in tree reported by Malcolm Rowe, replaceNode patch
2223 (Brent Hendricks), CDATA with NULL content (Mark Vakoc), xml:base fixup
2224 on XInclude (William), pattern fixes (William), attribute bug in
2225 exclusive c14n (Aleksey Sanin), xml:space and xml:lang with SAX2 (Rob
2226 Richards), namespace trouble in complex parsing (Malcolm Rowe), XSD type
2227 QNames fixes (Kasimier), XPath streaming fixups (William), RelaxNG bug
2228 (Rob Richards), Schemas for Schemas fixes (Kasimier), removal of ID (Rob
2229 Richards), a small RelaxNG leak, HTML parsing in push mode bug (James
2230 Bursa), failure to detect UTF-8 parsing bugs in CDATA sections,
2231 areBlanks() heuristic failure, duplicate attributes in DTD bug
2233 <li>improvements: lot of work on Schemas by Kasimier Buchcik both on
2234 conformance and streaming, Schemas validation messages (Kasimier Buchcik,
2235 Matthew Burgess), namespace removal at the python level (Brent
2236 Hendricks), Update to new Schemas regression tests from W3C/Nist
2237 (Kasimier), xmlSchemaValidateFile() (Kasimier), implementation of
2238 xmlTextReaderReadInnerXml and xmlTextReaderReadOuterXml (James Wert),
2239 standalone test framework and programs, new DOM import APIs
2240 xmlDOMWrapReconcileNamespaces() xmlDOMWrapAdoptNode() and
2241 xmlDOMWrapRemoveNode(), extension of xmllint capabilities for SAX and
2242 Schemas regression tests, xmlStopParser() available in pull mode too,
2243 ienhancement to xmllint --shell namespaces support, Windows port of the
2244 standalone testing tools (Kasimier and William),
2245 xmlSchemaValidateStream() xmlSchemaSAXPlug() and xmlSchemaSAXUnplug() SAX
2246 Schemas APIs, Schemas xmlReader support.</li>
2249 <h3>2.6.19: Apr 02 2005</h3>
2251 <li>build fixes: drop .la from RPMs, --with-minimum build fix (William
2252 Brack), use XML_SOCKLEN_T instead of SOCKLEN_T because it breaks with AIX
2253 5.3 compiler, fixed elfgcchack.h generation and PLT reduction code on
2255 <li>bug fixes: schemas type decimal fixups (William Brack), xmmlint return
2256 code (Gerry Murphy), small schemas fixes (Matthew Burgess and GUY
2257 Fabrice), workaround "DAV:" namespace brokeness in c14n (Aleksey Sanin),
2258 segfault in Schemas (Kasimier Buchcik), Schemas attribute validation
2259 (Kasimier), Prop related functions and xmlNewNodeEatName (Rob Richards),
2260 HTML serialization of name attribute on a elements, Python error handlers
2261 leaks and improvement (Brent Hendricks), uninitialized variable in
2262 encoding code, Relax-NG validation bug, potential crash if
2263 gnorableWhitespace is NULL, xmlSAXParseDoc and xmlParseDoc signatures,
2264 switched back to assuming UTF-8 in case no encoding is given at
2265 serialization time</li>
2266 <li>improvements: lot of work on Schemas by Kasimier Buchcik on facets
2267 checking and also mixed handling.</li>
2271 <h3>2.6.18: Mar 13 2005</h3>
2273 <li>build fixes: warnings (Peter Breitenlohner), testapi.c generation,
2274 Bakefile support (Francesco Montorsi), Windows compilation (Joel Reed),
2275 some gcc4 fixes, HP-UX portability fixes (Rick Jones).</li>
2276 <li>bug fixes: xmlSchemaElementDump namespace (Kasimier Buchcik), push and
2277 xmlreader stopping on non-fatal errors, thread support for dictionnaries
2278 reference counting (Gary Coady), internal subset and push problem, URL
2279 saved in xmlCopyDoc, various schemas bug fixes (Kasimier), Python paths
2280 fixup (Stephane Bidoul), xmlGetNodePath and namespaces, xmlSetNsProp fix
2281 (Mike Hommey), warning should not count as error (William Brack),
2282 xmlCreatePushParser empty chunk, XInclude parser flags (William), cleanup
2283 FTP and HTTP code to reuse the uri parsing and IPv6 (William),
2284 xmlTextWriterStartAttributeNS fix (Rob Richards), XMLLINT_INDENT being
2285 empty (William), xmlWriter bugs (Rob Richards), multithreading on Windows
2286 (Rich Salz), xmlSearchNsByHref fix (Kasimier), Python binding leak (Brent
2287 Hendricks), aliasing bug exposed by gcc4 on s390, xmlTextReaderNext bug
2288 (Rob Richards), Schemas decimal type fixes (William Brack),
2289 xmlByteConsumed static buffer (Ben Maurer).</li>
2290 <li>improvement: speedup parsing comments and DTDs, dictionary support for
2291 hash tables, Schemas Identity constraints (Kasimier), streaming XPath
2292 subset, xmlTextReaderReadString added (Bjorn Reese), Schemas canonical
2293 values handling (Kasimier), add xmlTextReaderByteConsumed (Aron
2295 <li>Documentation: Wiki support (Joel Reed)</li>
2298 <h3>2.6.17: Jan 16 2005</h3>
2300 <li>build fixes: Windows, warnings removal (William Brack),
2301 maintainer-clean dependency(William), build in a different directory
2302 (William), fixing --with-minimum configure build (William), BeOS build
2303 (Marcin Konicki), Python-2.4 detection (William), compilation on AIX (Dan
2305 <li>bug fixes: xmlTextReaderHasAttributes (Rob Richards), xmlCtxtReadFile()
2306 to use the catalog(s), loop on output (William Brack), XPath memory leak,
2307 ID deallocation problem (Steve Shepard), debugDumpNode crash (William),
2308 warning not using error callback (William), xmlStopParser bug (William),
2309 UTF-16 with BOM on DTDs (William), namespace bug on empty elements in
2310 push mode (Rob Richards), line and col computations fixups (Aleksey
2311 Sanin), xmlURIEscape fix (William), xmlXPathErr on bad range (William),
2312 patterns with too many steps, bug in RNG choice optimization, line number
2313 sometimes missing.</li>
2314 <li>improvements: XSD Schemas (Kasimier Buchcik), python generator
2315 (William), xmlUTF8Strpos speedup (William), unicode Python strings
2316 (William), XSD error reports (Kasimier Buchcik), Python __str__ call
2318 <li>new APIs: added xmlDictExists(), GetLineNumber and GetColumnNumber for
2319 the xmlReader (Aleksey Sanin), Dynamic Shared Libraries APIs (mostly Joel
2320 Reed), error extraction API from regexps, new XMLSave option for format
2322 <li>documentation: site improvement (John Fleck), FAQ entries
2326 <h3>2.6.16: Nov 10 2004</h3>
2328 <li>general hardening and bug fixing crossing all the API based on new
2329 automated regression testing</li>
2330 <li>build fix: IPv6 build and test on AIX (Dodji Seketeli)</li>
2331 <li>bug fixes: problem with XML::Libxml reported by Petr Pajas, encoding
2332 conversion functions return values, UTF-8 bug affecting XPath reported by
2333 Markus Bertheau, catalog problem with NULL entries (William Brack)</li>
2334 <li>documentation: fix to xmllint man page, some API function descritpion
2336 <li>improvements: DTD validation APIs provided at the Python level (Brent
2340 <h3>2.6.15: Oct 27 2004</h3>
2342 <li>security fixes on the nanoftp and nanohttp modules</li>
2343 <li>build fixes: xmllint detection bug in configure, building outside the
2344 source tree (Thomas Fitzsimmons)</li>
2345 <li>bug fixes: HTML parser on broken ASCII chars in names (William), Python
2346 paths (Malcolm Tredinnick), xmlHasNsProp and default namespace (William),
2347 saving to python file objects (Malcolm Tredinnick), DTD lookup fix
2348 (Malcolm), save back <group> in catalogs (William), tree build
2349 fixes (DV and Rob Richards), Schemas memory bug, structured error handler
2350 on Python 64bits, thread local memory deallocation, memory leak reported
2351 by Volker Roth, xmlValidateDtd in the presence of an internal subset,
2352 entities and _private problem (William), xmlBuildRelativeURI error
2354 <li>improvements: better XInclude error reports (William), tree debugging
2355 module and tests, convenience functions at the Reader API (Graham
2356 Bennett), add support for PI in the HTML parser.</li>
2359 <h3>2.6.14: Sep 29 2004</h3>
2361 <li>build fixes: configure paths for xmllint and xsltproc, compilation
2362 without HTML parser, compilation warning cleanups (William Brack &
2363 Malcolm Tredinnick), VMS makefile update (Craig Berry),</li>
2364 <li>bug fixes: xmlGetUTF8Char (William Brack), QName properties (Kasimier
2365 Buchcik), XInclude testing, Notation serialization, UTF8ToISO8859x
2366 transcoding (Mark Itzcovitz), lots of XML Schemas cleanup and fixes
2367 (Kasimier), ChangeLog cleanup (Stepan Kasal), memory fixes (Mark Vakoc),
2368 handling of failed realloc(), out of bound array adressing in Schemas
2369 date handling, Python space/tabs cleanups (Malcolm Tredinnick), NMTOKENS
2370 E20 validation fix (Malcolm),</li>
2371 <li>improvements: added W3C XML Schemas testsuite (Kasimier Buchcik), add
2372 xmlSchemaValidateOneElement (Kasimier), Python exception hierearchy
2373 (Malcolm Tredinnick), Python libxml2 driver improvement (Malcolm
2374 Tredinnick), Schemas support for xsi:schemaLocation,
2375 xsi:noNamespaceSchemaLocation, xsi:type (Kasimier Buchcik)</li>
2378 <h3>2.6.13: Aug 31 2004</h3>
2380 <li>build fixes: Windows and zlib (Igor Zlatkovic), -O flag with gcc,
2381 Solaris compiler warning, fixing RPM BuildRequires,</li>
2382 <li>fixes: DTD loading on Windows (Igor), Schemas error reports APIs
2383 (Kasimier Buchcik), Schemas validation crash, xmlCheckUTF8 (William Brack
2384 and Julius Mittenzwei), Schemas facet check (Kasimier), default namespace
2385 problem (William), Schemas hexbinary empty values, encoding error could
2386 genrate a serialization loop.</li>
2387 <li>Improvements: Schemas validity improvements (Kasimier), added --path
2388 and --load-trace options to xmllint</li>
2389 <li>documentation: tutorial update (John Fleck)</li>
2392 <h3>2.6.12: Aug 22 2004</h3>
2394 <li>build fixes: fix --with-minimum, elfgcchack.h fixes (Peter
2395 Breitenlohner), perl path lookup (William), diff on Solaris (Albert
2396 Chin), some 64bits cleanups.</li>
2397 <li>Python: avoid a warning with 2.3 (William Brack), tab and space mixes
2398 (William), wrapper generator fixes (William), Cygwin support (Gerrit P.
2399 Haase), node wrapper fix (Marc-Antoine Parent), XML Schemas support
2401 <li>Schemas: a lot of bug fixes and improvements from Kasimier Buchcik</li>
2402 <li>fixes: RVT fixes (William), XPath context resets bug (William), memory
2403 debug (Steve Hay), catalog white space handling (Peter Breitenlohner),
2404 xmlReader state after attribute reading (William), structured error
2405 handler (William), XInclude generated xml:base fixup (William), Windows
2406 memory reallocation problem (Steve Hay), Out of Memory conditions
2407 handling (William and Olivier Andrieu), htmlNewDoc() charset bug,
2408 htmlReadMemory init (William), a posteriori validation DTD base
2409 (William), notations serialization missing, xmlGetNodePath (Dodji),
2410 xmlCheckUTF8 (Diego Tartara), missing line numbers on entity
2412 <li>improvements: DocBook catalog build scrip (William), xmlcatalog tool
2413 (Albert Chin), xmllint --c14n option, no_proxy environment (Mike Hommey),
2414 xmlParseInNodeContext() addition, extend xmllint --shell, allow XInclude
2415 to not generate start/end nodes, extend xmllint --version to include CVS
2417 <li>documentation: web pages fixes, validity API docs fixes (William)
2418 schemas API fix (Eric Haszlakiewicz), xmllint man page (John Fleck)</li>
2421 <h3>2.6.11: July 5 2004</h3>
2423 <li>Schemas: a lot of changes and improvements by Kasimier Buchcik for
2424 attributes, namespaces and simple types.</li>
2425 <li>build fixes: --with-minimum (William Brack), some gcc cleanup
2426 (William), --with-thread-alloc (William)</li>
2427 <li>portability: Windows binary package change (Igor Zlatkovic), Catalog
2428 path on Windows</li>
2429 <li>documentation: update to the tutorial (John Fleck), xmllint return code
2430 (John Fleck), man pages (Ville Skytta),</li>
2431 <li>bug fixes: C14N bug serializing namespaces (Aleksey Sanin), testSAX
2432 properly initialize the library (William), empty node set in XPath
2433 (William), xmlSchemas errors (William), invalid charref problem pointed
2434 by Morus Walter, XInclude xml:base generation (William), Relax-NG bug
2435 with div processing (William), XPointer and xml:base problem(William),
2436 Reader and entities, xmllint return code for schemas (William), reader
2437 streaming problem (Steve Ball), DTD serialization problem (William),
2438 libxml.m4 fixes (Mike Hommey), do not provide destructors as methods on
2439 Python classes, xmlReader buffer bug, Python bindings memory interfaces
2440 improvement (with Stéphane Bidoul), Fixed the push parser to be back to
2441 synchronous behaviour.</li>
2442 <li>improvement: custom per-thread I/O enhancement (Rob Richards), register
2443 namespace in debug shell (Stefano Debenedetti), Python based regression
2444 test for non-Unix users (William), dynamically increase the number of
2445 XPath extension functions in Python and fix a memory leak (Marc-Antoine
2446 Parent and William)</li>
2447 <li>performance: hack done with Arjan van de Ven to reduce ELF footprint
2448 and generated code on Linux, plus use gcc runtime profiling to optimize
2449 the code generated in the RPM packages.</li>
2452 <h3>2.6.10: May 17 2004</h3>
2454 <li>Web page generated for ChangeLog</li>
2455 <li>build fixes: --without-html problems, make check without make all</li>
2456 <li>portability: problem with xpath.c on Windows (MSC and Borland), memcmp
2457 vs. strncmp on Solaris, XPath tests on Windows (Mark Vakoc), C++ do not
2458 use "list" as parameter name, make tests work with Python 1.5 (Ed
2460 <li>improvements: made xmlTextReaderMode public, small buffers resizing
2461 (Morten Welinder), add --maxmem option to xmllint, add
2462 xmlPopInputCallback() for Matt Sergeant, refactoring of serialization
2463 escaping, added escaping customization</li>
2464 <li>bugfixes: xsd:extension (Taihei Goi), assorted regexp bugs (William
2465 Brack), xmlReader end of stream problem, node deregistration with reader,
2466 URI escaping and filemanes, XHTML1 formatting (Nick Wellnhofer), regexp
2467 transition reduction (William), various XSD Schemas fixes (Kasimier
2468 Buchcik), XInclude fallback problem (William), weird problems with DTD
2469 (William), structured error handler callback context (William), reverse
2470 xmlEncodeSpecialChars() behaviour back to escaping '"'</li>
2473 <h3>2.6.9: Apr 18 2004</h3>
2475 <li>implement xml:id Working Draft, relaxed XPath id() checking</li>
2476 <li>bugfixes: xmlCtxtReset (Brent Hendricks), line number and CDATA (Dave
2477 Beckett), Relax-NG compilation (William Brack), Regexp patches (with
2478 William), xmlUriEscape (Mark Vakoc), a Relax-NG notAllowed problem (with
2479 William), Relax-NG name classes compares (William), XInclude duplicate
2480 fallback (William), external DTD encoding detection (William), a DTD
2481 validation bug (William), xmlReader Close() fix, recusive extention
2483 <li>improvements: use xmlRead* APIs in test tools (Mark Vakoc), indenting
2484 save optimization, better handle IIS broken HTTP redirect behaviour (Ian
2485 Hummel), HTML parser frameset (James Bursa), libxml2-python RPM
2486 dependancy, XML Schemas union support (Kasimier Buchcik), warning removal
2487 clanup (William), keep ChangeLog compressed when installing from RPMs</li>
2488 <li>documentation: examples and xmlDocDumpMemory docs (John Fleck), new
2489 example (load, xpath, modify, save), xmlCatalogDump() comments,</li>
2490 <li>Windows: Borland C++ builder (Eric Zurcher), work around Microsoft
2491 compiler NaN handling bug (Mark Vakoc)</li>
2494 <h3>2.6.8: Mar 23 2004</h3>
2496 <li>First step of the cleanup of the serialization code and APIs</li>
2497 <li>XML Schemas: mixed content (Adam Dickmeiss), QName handling fixes (Adam
2498 Dickmeiss), anyURI for "" (John Belmonte)</li>
2499 <li>Python: Canonicalization C14N support added (Anthony Carrico)</li>
2500 <li>xmlDocCopyNode() extension (William)</li>
2501 <li>Relax-NG: fix when processing XInclude results (William), external
2502 reference in interleave (William), missing error on <choice>
2503 failure (William), memory leak in schemas datatype facets.</li>
2504 <li>xmlWriter: patch for better DTD support (Alfred Mickautsch)</li>
2505 <li>bug fixes: xmlXPathLangFunction memory leak (Mike Hommey and William
2506 Brack), no ID errors if using HTML_PARSE_NOERROR, xmlcatalog fallbacks to
2507 URI on SYSTEM lookup failure, XInclude parse flags inheritance (William),
2508 XInclude and XPointer fixes for entities (William), XML parser bug
2509 reported by Holger Rauch, nanohttp fd leak (William), regexps char
2510 groups '-' handling (William), dictionary reference counting problems,
2511 do not close stderr.</li>
2512 <li>performance patches from Petr Pajas</li>
2513 <li>Documentation fixes: XML_CATALOG_FILES in man pages (Mike Hommey)</li>
2514 <li>compilation and portability fixes: --without-valid, catalog cleanups
2515 (Peter Breitenlohner), MingW patch (Roland Schwingel), cross-compilation
2516 to Windows (Christophe de Vienne), --with-html-dir fixup (Julio Merino
2517 Vidal), Windows build (Eric Zurcher)</li>
2520 <h3>2.6.7: Feb 23 2004</h3>
2522 <li>documentation: tutorial updates (John Fleck), benchmark results</li>
2523 <li>xmlWriter: updates and fixes (Alfred Mickautsch, Lucas Brasilino)</li>
2524 <li>XPath optimization (Petr Pajas)</li>
2525 <li>DTD ID handling optimization</li>
2526 <li>bugfixes: xpath number with > 19 fractional (William Brack), push
2527 mode with unescaped '>' characters, fix xmllint --stream --timing, fix
2528 xmllint --memory --stream memory usage, xmlAttrSerializeTxtContent
2529 handling NULL, trying to fix Relax-NG/Perl interface.</li>
2530 <li>python: 2.3 compatibility, whitespace fixes (Malcolm Tredinnick)</li>
2531 <li>Added relaxng option to xmllint --shell</li>
2534 <h3>2.6.6: Feb 12 2004</h3>
2536 <li>nanohttp and nanoftp: buffer overflow error on URI parsing (Igor and
2537 William) reported by Yuuichi Teranishi</li>
2538 <li>bugfixes: make test and path issues, xmlWriter attribute serialization
2539 (William Brack), xmlWriter indentation (William), schemas validation
2540 (Eric Haszlakiewicz), XInclude dictionnaries issues (William and Oleg
2541 Paraschenko), XInclude empty fallback (William), HTML warnings (William),
2542 XPointer in XInclude (William), Python namespace serialization,
2543 isolat1ToUTF8 bound error (Alfred Mickautsch), output of parameter
2544 entities in internal subset (William), internal subset bug in push mode,
2545 <xs:all> fix (Alexey Sarytchev)</li>
2546 <li>Build: fix for automake-1.8 (Alexander Winston), warnings removal
2547 (Philip Ludlam), SOCKLEN_T detection fixes (Daniel Richard), fix
2548 --with-minimum configuration.</li>
2549 <li>XInclude: allow the 2001 namespace without warning.</li>
2550 <li>Documentation: missing example/index.html (John Fleck), version
2551 dependancies (John Fleck)</li>
2552 <li>reader API: structured error reporting (Steve Ball)</li>
2553 <li>Windows compilation: mingw, msys (Mikhail Grushinskiy), function
2554 prototype (Cameron Johnson), MSVC6 compiler warnings, _WINSOCKAPI_
2556 <li>Parsers: added xmlByteConsumed(ctxt) API to get the byte offest in
2560 <h3>2.6.5: Jan 25 2004</h3>
2562 <li>Bugfixes: dictionnaries for schemas (William Brack), regexp segfault
2563 (William), xs:all problem (William), a number of XPointer bugfixes
2564 (William), xmllint error go to stderr, DTD validation problem with
2565 namespace, memory leak (William), SAX1 cleanup and minimal options fixes
2566 (Mark Vadoc), parser context reset on error (Shaun McCance), XPath union
2567 evaluation problem (William) , xmlReallocLoc with NULL (Aleksey Sanin),
2568 XML Schemas double free (Steve Ball), XInclude with no href, argument
2569 callbacks order for XPath callbacks (Frederic Peters)</li>
2570 <li>Documentation: python scripts (William Brack), xslt stylesheets (John
2571 Fleck), doc (Sven Zimmerman), I/O example.</li>
2572 <li>Python bindings: fixes (William), enum support (Stéphane Bidoul),
2573 structured error reporting (Stéphane Bidoul)</li>
2574 <li>XInclude: various fixes for conformance, problem related to dictionary
2575 references (William & me), recursion (William)</li>
2576 <li>xmlWriter: indentation (Lucas Brasilino), memory leaks (Alfred
2578 <li>xmlSchemas: normalizedString datatype (John Belmonte)</li>
2579 <li>code cleanup for strings functions (William)</li>
2580 <li>Windows: compiler patches (Mark Vakoc)</li>
2581 <li>Parser optimizations, a few new XPath and dictionary APIs for future
2582 XSLT optimizations.</li>
2585 <h3>2.6.4: Dec 24 2003</h3>
2587 <li>Windows build fixes (Igor Zlatkovic)</li>
2588 <li>Some serious XInclude problems reported by Oleg Paraschenko and</li>
2589 <li>Unix and Makefile packaging fixes (me, William Brack,</li>
2590 <li>Documentation improvements (John Fleck, William Brack), example fix
2591 (Lucas Brasilino)</li>
2592 <li>bugfixes: xmlTextReaderExpand() with xmlReaderWalker, XPath handling of
2593 NULL strings (William Brack) , API building reader or parser from
2594 filedescriptor should not close it, changed XPath sorting to be stable
2595 again (William Brack), xmlGetNodePath() generating '(null)' (William
2596 Brack), DTD validation and namespace bug (William Brack), XML Schemas
2597 double inclusion behaviour</li>
2600 <h3>2.6.3: Dec 10 2003</h3>
2602 <li>documentation updates and cleanup (DV, William Brack, John Fleck)</li>
2603 <li>added a repository of examples, examples from Aleksey Sanin, Dodji
2604 Seketeli, Alfred Mickautsch</li>
2605 <li>Windows updates: Mark Vakoc, Igor Zlatkovic, Eric Zurcher, Mingw
2606 (Kenneth Haley)</li>
2607 <li>Unicode range checking (William Brack)</li>
2608 <li>code cleanup (William Brack)</li>
2609 <li>Python bindings: doc (John Fleck), bug fixes</li>
2610 <li>UTF-16 cleanup and BOM issues (William Brack)</li>
2611 <li>bug fixes: ID and xmlReader validation, XPath (William Brack),
2612 xmlWriter (Alfred Mickautsch), hash.h inclusion problem, HTML parser
2613 (James Bursa), attribute defaulting and validation, some serialization
2614 cleanups, XML_GET_LINE macro, memory debug when using threads (William
2615 Brack), serialization of attributes and entities content, xmlWriter
2616 (Daniel Schulman)</li>
2617 <li>XInclude bugfix, new APIs and update to the last version including the
2618 namespace change.</li>
2619 <li>XML Schemas improvements: include (Robert Stepanek), import and
2620 namespace handling, fixed the regression tests troubles, added examples
2621 based on Eric van der Vlist book, regexp fixes</li>
2622 <li>preliminary pattern support for streaming (needed for schemas
2623 constraints), added xmlTextReaderPreservePattern() to collect subdocument
2624 when streaming.</li>
2625 <li>various fixes in the structured error handling</li>
2628 <h3>2.6.2: Nov 4 2003</h3>
2630 <li>XPath context unregistration fixes</li>
2631 <li>text node coalescing fixes (Mark Lilback)</li>
2632 <li>API to screate a W3C Schemas from an existing document (Steve Ball)</li>
2633 <li>BeOS patches (Marcin 'Shard' Konicki)</li>
2634 <li>xmlStrVPrintf function added (Aleksey Sanin)</li>
2635 <li>compilation fixes (Mark Vakoc)</li>
2636 <li>stdin parsing fix (William Brack)</li>
2637 <li>a posteriori DTD validation fixes</li>
2638 <li>xmlReader bug fixes: Walker fixes, python bindings</li>
2639 <li>fixed xmlStopParser() to really stop the parser and errors</li>
2640 <li>always generate line numbers when using the new xmlReadxxx
2642 <li>added XInclude support to the xmlReader interface</li>
2643 <li>implemented XML_PARSE_NONET parser option</li>
2644 <li>DocBook XSLT processing bug fixed</li>
2645 <li>HTML serialization for <p> elements (William Brack and me)</li>
2646 <li>XPointer failure in XInclude are now handled as resource errors</li>
2647 <li>fixed xmllint --html to use the HTML serializer on output (added
2648 --xmlout to implement the previous behaviour of saving it using the XML
2652 <h3>2.6.1: Oct 28 2003</h3>
2654 <li>Mostly bugfixes after the big 2.6.0 changes</li>
2655 <li>Unix compilation patches: libxml.m4 (Patrick Welche), warnings cleanup
2656 (William Brack)</li>
2657 <li>Windows compilation patches (Joachim Bauch, Stephane Bidoul, Igor
2659 <li>xmlWriter bugfix (Alfred Mickautsch)</li>
2660 <li>chvalid.[ch]: couple of fixes from Stephane Bidoul</li>
2661 <li>context reset: error state reset, push parser reset (Graham
2663 <li>context reuse: generate errors if file is not readable</li>
2664 <li>defaulted attributes for element coming from internal entities
2665 (Stephane Bidoul)</li>
2666 <li>Python: tab and spaces mix (William Brack)</li>
2667 <li>Error handler could crash in DTD validation in 2.6.0</li>
2668 <li>xmlReader: do not use the document or element _private field</li>
2669 <li>testSAX.c: avoid a problem with some PIs (Massimo Morara)</li>
2670 <li>general bug fixes: mandatory encoding in text decl, serializing
2671 Document Fragment nodes, xmlSearchNs 2.6.0 problem (Kasimier Buchcik),
2672 XPath errors not reported, slow HTML parsing of large documents.</li>
2675 <h3>2.6.0: Oct 20 2003</h3>
2677 <li>Major revision release: should be API and ABI compatible but got a lot
2679 <li>Increased the library modularity, far more options can be stripped out,
2680 a --with-minimum configuration will weight around 160KBytes</li>
2681 <li>Use per parser and per document dictionary, allocate names and small
2682 text nodes from the dictionary</li>
2683 <li>Switch to a SAX2 like parser rewrote most of the XML parser core,
2684 provides namespace resolution and defaulted attributes, minimize memory
2685 allocations and copies, namespace checking and specific error handling,
2686 immutable buffers, make predefined entities static structures, etc...</li>
2687 <li>rewrote all the error handling in the library, all errors can be
2688 intercepted at a structured level, with precise information
2690 <li>New simpler and more generic XML and HTML parser APIs, allowing to
2691 easilly modify the parsing options and reuse parser context for multiple
2692 consecutive documents.</li>
2693 <li>Similar new APIs for the xmlReader, for options and reuse, provided new
2694 functions to access content as const strings, use them for Python
2696 <li>a lot of other smaller API improvements: xmlStrPrintf (Aleksey Sanin),
2697 Walker i.e. reader on a document tree based on Alfred Mickautsch code,
2698 make room in nodes for line numbers, reference counting and future PSVI
2699 extensions, generation of character ranges to be checked with faster
2700 algorithm (William), xmlParserMaxDepth (Crutcher Dunnavant), buffer
2702 <li>New xmlWriter API provided by Alfred Mickautsch</li>
2703 <li>Schemas: base64 support by Anthony Carrico</li>
2704 <li>Parser<->HTTP integration fix, proper processing of the Mime-Type
2705 and charset information if available.</li>
2706 <li>Relax-NG: bug fixes including the one reported by Martijn Faassen and
2707 zeroOrMore, better error reporting.</li>
2708 <li>Python bindings (Stéphane Bidoul), never use stdout for errors
2710 <li>Portability: all the headers have macros for export and calling
2711 convention definitions (Igor Zlatkovic), VMS update (Craig A. Berry),
2712 Windows: threads (Jesse Pelton), Borland compiler (Eric Zurcher, Igor),
2713 Mingw (Igor), typos (Mark Vakoc), beta version (Stephane Bidoul),
2714 warning cleanups on AIX and MIPS compilers (William Brack), BeOS (Marcin
2715 'Shard' Konicki)</li>
2716 <li>Documentation fixes and README (William Brack), search fix (William),
2717 tutorial updates (John Fleck), namespace docs (Stefan Kost)</li>
2718 <li>Bug fixes: xmlCleanupParser (Dave Beckett), threading uninitialized
2719 mutexes, HTML doctype lowercase, SAX/IO (William), compression detection
2720 and restore (William), attribute declaration in DTDs (William), namespace
2721 on attribute in HTML output (William), input filename (Rob Richards),
2722 namespace DTD validation, xmlReplaceNode (Chris Ryland), I/O callbacks
2723 (Markus Keim), CDATA serialization (Shaun McCance), xmlReader (Peter
2724 Derr), high codepoint charref like &#x10FFFF;, buffer access in push
2725 mode (Justin Fletcher), TLS threads on Windows (Jesse Pelton), XPath bug
2726 (William), xmlCleanupParser (Marc Liyanage), CDATA output (William), HTTP
2727 error handling.</li>
2728 <li>xmllint options: --dtdvalidfpi for Tobias Reif, --sax1 for compat
2729 testing, --nodict for building without tree dictionary, --nocdata to
2730 replace CDATA by text, --nsclean to remove surperfluous namespace
2732 <li>added xml2-config --libtool-libs option from Kevin P. Fleming</li>
2733 <li>a lot of profiling and tuning of the code, speedup patch for
2734 xmlSearchNs() by Luca Padovani. The xmlReader should do far less
2735 allocation and it speed should get closer to SAX. Chris Anderson worked
2736 on speeding and cleaning up repetitive checking code.</li>
2737 <li>cleanup of "make tests"</li>
2738 <li>libxml-2.0-uninstalled.pc from Malcolm Tredinnick</li>
2739 <li>deactivated the broken docBook SGML parser code and plugged the XML
2740 parser instead.</li>
2743 <h3>2.5.11: Sep 9 2003</h3>
2745 <p>A bugfix only release:</p>
2747 <li>risk of crash in Relax-NG</li>
2748 <li>risk of crash when using multithreaded programs</li>
2751 <h3>2.5.10: Aug 15 2003</h3>
2753 <p>A bugfixes only release</p>
2755 <li>Windows Makefiles (William Brack)</li>
2756 <li>UTF-16 support fixes (Mark Itzcovitz)</li>
2757 <li>Makefile and portability (William Brack) automake, Linux alpha, Mingw
2758 on Windows (Mikhail Grushinskiy)</li>
2759 <li>HTML parser (Oliver Stoeneberg)</li>
2760 <li>XInclude performance problem reported by Kevin Ruscoe</li>
2761 <li>XML parser performance problem reported by Grant Goodale</li>
2762 <li>xmlSAXParseDTD() bug fix from Malcolm Tredinnick</li>
2763 <li>and a couple other cleanup</li>
2766 <h3>2.5.9: Aug 9 2003</h3>
2768 <li>bugfixes: IPv6 portability, xmlHasNsProp (Markus Keim), Windows build
2769 (Wiliam Brake, Jesse Pelton, Igor), Schemas (Peter Sobisch), threading
2770 (Rob Richards), hexBinary type (), UTF-16 BOM (Dodji Seketeli),
2771 xmlReader, Relax-NG schemas compilation, namespace handling, EXSLT (Sean
2772 Griffin), HTML parsing problem (William Brack), DTD validation for mixed
2773 content + namespaces, HTML serialization, library initialization,
2774 progressive HTML parser</li>
2775 <li>better interfaces for Relax-NG error handling (Joachim Bauch, )</li>
2776 <li>adding xmlXIncludeProcessTree() for XInclud'ing in a subtree</li>
2777 <li>doc fixes and improvements (John Fleck)</li>
2778 <li>configure flag for -with-fexceptions when embedding in C++</li>
2779 <li>couple of new UTF-8 helper functions (William Brack)</li>
2780 <li>general encoding cleanup + ISO-8859-x without iconv (Peter Jacobi)</li>
2781 <li>xmlTextReader cleanup + enum for node types (Bjorn Reese)</li>
2782 <li>general compilation/warning cleanup Solaris/HP-UX/... (William
2786 <h3>2.5.8: Jul 6 2003</h3>
2788 <li>bugfixes: XPath, XInclude, file/URI mapping, UTF-16 save (Mark
2789 Itzcovitz), UTF-8 checking, URI saving, error printing (William Brack),
2790 PI related memleak, compilation without schemas or without xpath (Joerg
2791 Schmitz-Linneweber/Garry Pennington), xmlUnlinkNode problem with DTDs,
2792 rpm problem on , i86_64, removed a few compilation problems from 2.5.7,
2793 xmlIOParseDTD, and xmlSAXParseDTD (Malcolm Tredinnick)</li>
2794 <li>portability: DJGPP (MsDos) , OpenVMS (Craig A. Berry)</li>
2795 <li>William Brack fixed multithreading lock problems</li>
2796 <li>IPv6 patch for FTP and HTTP accesses (Archana Shah/Wipro)</li>
2797 <li>Windows fixes (Igor Zlatkovic, Eric Zurcher), threading (Stéphane
2799 <li>A few W3C Schemas Structure improvements</li>
2800 <li>W3C Schemas Datatype improvements (Charlie Bozeman)</li>
2801 <li>Python bindings for thread globals (Stéphane Bidoul), and method/class
2803 <li>added --nonet option to xmllint</li>
2804 <li>documentation improvements (John Fleck)</li>
2807 <h3>2.5.7: Apr 25 2003</h3>
2809 <li>Relax-NG: Compiling to regexp and streaming validation on top of the
2810 xmlReader interface, added to xmllint --stream</li>
2811 <li>xmlReader: Expand(), Next() and DOM access glue, bug fixes</li>
2812 <li>Support for large files: RGN validated a 4.5GB instance</li>
2813 <li>Thread support is now configured in by default</li>
2814 <li>Fixes: update of the Trio code (Bjorn), WXS Date and Duration fixes
2815 (Charles Bozeman), DTD and namespaces (Brent Hendricks), HTML push parser
2816 and zero bytes handling, some missing Windows file path conversions,
2817 behaviour of the parser and validator in the presence of "out of memory"
2818 error conditions</li>
2819 <li>extended the API to be able to plug a garbage collecting memory
2820 allocator, added xmlMallocAtomic() and modified the allocations
2822 <li>Performances: removed excessive malloc() calls, speedup of the push and
2823 xmlReader interfaces, removed excessive thread locking</li>
2824 <li>Documentation: man page (John Fleck), xmlReader documentation</li>
2825 <li>Python: adding binding for xmlCatalogAddLocal (Brent M Hendricks)</li>
2828 <h3>2.5.6: Apr 1 2003</h3>
2830 <li>Fixed W3C XML Schemas datatype, should be compliant now except for
2831 binHex and base64 which are not supported yet.</li>
2832 <li>bug fixes: non-ASCII IDs, HTML output, XInclude on large docs and
2833 XInclude entities handling, encoding detection on external subsets, XML
2834 Schemas bugs and memory leaks, HTML parser (James Bursa)</li>
2835 <li>portability: python/trio (Albert Chin), Sun compiler warnings</li>
2836 <li>documentation: added --relaxng option to xmllint man page (John)</li>
2837 <li>improved error reporting: xml:space, start/end tag mismatches, Relax NG
2841 <h3>2.5.5: Mar 24 2003</h3>
2843 <li>Lot of fixes on the Relax NG implementation. More testing including
2844 DocBook and TEI examples.</li>
2845 <li>Increased the support for W3C XML Schemas datatype</li>
2846 <li>Several bug fixes in the URI handling layer</li>
2847 <li>Bug fixes: HTML parser, xmlReader, DTD validation, XPath, encoding
2848 conversion, line counting in the parser.</li>
2849 <li>Added support for $XMLLINT_INDENT environment variable, FTP delete</li>
2850 <li>Fixed the RPM spec file name</li>
2853 <h3>2.5.4: Feb 20 2003</h3>
2855 <li>Conformance testing and lot of fixes on Relax NG and XInclude
2857 <li>Implementation of XPointer element() scheme</li>
2858 <li>Bug fixes: XML parser, XInclude entities merge, validity checking on
2860 <p>2 serialization bugs, node info generation problems, a DTD regexp
2861 generation problem.</p>
2863 <li>Portability: windows updates and path canonicalization (Igor)</li>
2864 <li>A few typo fixes (Kjartan Maraas)</li>
2865 <li>Python bindings generator fixes (Stephane Bidoul)</li>
2868 <h3>2.5.3: Feb 10 2003</h3>
2870 <li>RelaxNG and XML Schemas datatypes improvements, and added a first
2871 version of RelaxNG Python bindings</li>
2872 <li>Fixes: XLink (Sean Chittenden), XInclude (Sean Chittenden), API fix for
2873 serializing namespace nodes, encoding conversion bug, XHTML1
2875 <li>Portability fixes: Windows (Igor), AMD 64bits RPM spec file</li>
2878 <h3>2.5.2: Feb 5 2003</h3>
2880 <li>First implementation of RelaxNG, added --relaxng flag to xmllint</li>
2881 <li>Schemas support now compiled in by default.</li>
2882 <li>Bug fixes: DTD validation, namespace checking, XInclude and entities,
2883 delegateURI in XML Catalogs, HTML parser, XML reader (Stéphane Bidoul),
2884 XPath parser and evaluation, UTF8ToUTF8 serialization, XML reader memory
2885 consumption, HTML parser, HTML serialization in the presence of
2887 <li>added an HTML API to check elements and attributes.</li>
2888 <li>Documentation improvement, PDF for the tutorial (John Fleck), doc
2889 patches (Stefan Kost)</li>
2890 <li>Portability fixes: NetBSD (Julio Merino), Windows (Igor Zlatkovic)</li>
2891 <li>Added python bindings for XPointer, contextual error reporting
2892 (Stéphane Bidoul)</li>
2893 <li>URI/file escaping problems (Stefano Zacchiroli)</li>
2896 <h3>2.5.1: Jan 8 2003</h3>
2898 <li>Fixes a memory leak and configuration/compilation problems in 2.5.0</li>
2899 <li>documentation updates (John)</li>
2900 <li>a couple of XmlTextReader fixes</li>
2903 <h3>2.5.0: Jan 6 2003</h3>
2905 <li>New <a href="xmlreader.html">XmltextReader interface</a> based on C#
2906 API (with help of Stéphane Bidoul)</li>
2907 <li>Windows: more exports, including the new API (Igor)</li>
2908 <li>XInclude fallback fix</li>
2909 <li>Python: bindings for the new API, packaging (Stéphane Bidoul),
2910 drv_libxml2.py Python xml.sax driver (Stéphane Bidoul), fixes, speedup
2911 and iterators for Python-2.2 (Hannu Krosing)</li>
2912 <li>Tutorial fixes (john Fleck and Niraj Tolia) xmllint man update
2914 <li>Fix an XML parser bug raised by Vyacheslav Pindyura</li>
2915 <li>Fix for VMS serialization (Nigel Hall) and config (Craig A. Berry)</li>
2916 <li>Entities handling fixes</li>
2917 <li>new API to optionally track node creation and deletion (Lukas
2919 <li>Added documentation for the XmltextReader interface and some <a
2920 href="guidelines.html">XML guidelines</a></li>
2923 <h3>2.4.30: Dec 12 2002</h3>
2925 <li>2.4.29 broke the python bindings, rereleasing</li>
2926 <li>Improvement/fixes of the XML API generator, and couple of minor code
2930 <h3>2.4.29: Dec 11 2002</h3>
2932 <li>Windows fixes (Igor): Windows CE port, pthread linking, python bindings
2933 (Stéphane Bidoul), Mingw (Magnus Henoch), and export list updates</li>
2934 <li>Fix for prev in python bindings (ERDI Gergo)</li>
2935 <li>Fix for entities handling (Marcus Clarke)</li>
2936 <li>Refactored the XML and HTML dumps to a single code path, fixed XHTML1
2938 <li>Fix for URI parsing when handling URNs with fragment identifiers</li>
2939 <li>Fix for HTTP URL escaping problem</li>
2940 <li>added an TextXmlReader (C#) like API (work in progress)</li>
2941 <li>Rewrote the API in XML generation script, includes a C parser and saves
2942 more information needed for C# bindings</li>
2945 <h3>2.4.28: Nov 22 2002</h3>
2947 <li>a couple of python binding fixes</li>
2948 <li>2 bug fixes in the XML push parser</li>
2949 <li>potential memory leak removed (Martin Stoilov)</li>
2950 <li>fix to the configure script for Unix (Dimitri Papadopoulos)</li>
2951 <li>added encoding support for XInclude parse="text"</li>
2952 <li>autodetection of XHTML1 and specific serialization rules added</li>
2953 <li>nasty threading bug fixed (William Brack)</li>
2956 <h3>2.4.27: Nov 17 2002</h3>
2958 <li>fixes for the Python bindings</li>
2959 <li>a number of bug fixes: SGML catalogs, xmlParseBalancedChunkMemory(),
2960 HTML parser, Schemas (Charles Bozeman), document fragment support
2961 (Christian Glahn), xmlReconciliateNs (Brian Stafford), XPointer,
2962 xmlFreeNode(), xmlSAXParseMemory (Peter Jones), xmlGetNodePath (Petr
2963 Pajas), entities processing</li>
2964 <li>added grep to xmllint --shell</li>
2965 <li>VMS update patch from Craig A. Berry</li>
2966 <li>cleanup of the Windows build with support for more compilers (Igor),
2967 better thread support on Windows</li>
2968 <li>cleanup of Unix Makefiles and spec file</li>
2969 <li>Improvements to the documentation (John Fleck)</li>
2972 <h3>2.4.26: Oct 18 2002</h3>
2974 <li>Patches for Windows CE port, improvements on Windows paths handling</li>
2975 <li>Fixes to the validation code (DTD and Schemas), xmlNodeGetPath() ,
2976 HTML serialization, Namespace compliance, and a number of small
2980 <h3>2.4.25: Sep 26 2002</h3>
2982 <li>A number of bug fixes: XPath, validation, Python bindings, DOM and
2983 tree, xmlI/O, Html</li>
2984 <li>Serious rewrite of XInclude</li>
2985 <li>Made XML Schemas regexp part of the default build and APIs, small fix
2986 and improvement of the regexp core</li>
2987 <li>Changed the validation code to reuse XML Schemas regexp APIs</li>
2988 <li>Better handling of Windows file paths, improvement of Makefiles (Igor,
2989 Daniel Gehriger, Mark Vakoc)</li>
2990 <li>Improved the python I/O bindings, the tests, added resolver and regexp
2992 <li>New logos from Marc Liyanage</li>
2993 <li>Tutorial improvements: John Fleck, Christopher Harris</li>
2994 <li>Makefile: Fixes for AMD x86_64 (Mandrake), DESTDIR (Christophe
2996 <li>removal of all stderr/perror use for error reporting</li>
2997 <li>Better error reporting: XPath and DTD validation</li>
2998 <li>update of the trio portability layer (Bjorn Reese)</li>
3001 <p><strong>2.4.24: Aug 22 2002</strong></p>
3003 <li>XPath fixes (William), xf:escape-uri() (Wesley Terpstra)</li>
3004 <li>Python binding fixes: makefiles (William), generator, rpm build, x86-64
3006 <li>HTML <style> and boolean attributes serializer fixes</li>
3007 <li>C14N improvements by Aleksey</li>
3008 <li>doc cleanups: Rick Jones</li>
3009 <li>Windows compiler makefile updates: Igor and Elizabeth Barham</li>
3010 <li>XInclude: implementation of fallback and xml:base fixup added</li>
3013 <h3>2.4.23: July 6 2002</h3>
3015 <li>performances patches: Peter Jacobi</li>
3016 <li>c14n fixes, testsuite and performances: Aleksey Sanin</li>
3017 <li>added xmlDocFormatDump: Chema Celorio</li>
3018 <li>new tutorial: John Fleck</li>
3019 <li>new hash functions and performances: Sander Vesik, portability fix from
3021 <li>a number of bug fixes: XPath (William Brack, Richard Jinks), XML and
3022 HTML parsers, ID lookup function</li>
3023 <li>removal of all remaining sprintf: Aleksey Sanin</li>
3026 <h3>2.4.22: May 27 2002</h3>
3028 <li>a number of bug fixes: configure scripts, base handling, parser, memory
3029 usage, HTML parser, XPath, documentation (Christian Cornelssen),
3030 indentation, URI parsing</li>
3031 <li>Optimizations for XMLSec, fixing and making public some of the network
3032 protocol handlers (Aleksey)</li>
3033 <li>performance patch from Gary Pennington</li>
3034 <li>Charles Bozeman provided date and time support for XML Schemas
3038 <h3>2.4.21: Apr 29 2002</h3>
3040 <p>This release is both a bug fix release and also contains the early XML
3041 Schemas <a href="http://www.w3.org/TR/xmlschema-1/">structures</a> and <a
3042 href="http://www.w3.org/TR/xmlschema-2/">datatypes</a> code, beware, all
3043 interfaces are likely to change, there is huge holes, it is clearly a work in
3044 progress and don't even think of putting this code in a production system,
3045 it's actually not compiled in by default. The real fixes are:
3049 <li>a couple of bugs or limitations introduced in 2.4.20</li>
3050 <li>patches for Borland C++ and MSC by Igor</li>
3051 <li>some fixes on XPath strings and conformance patches by Richard
3053 <li>patch from Aleksey for the ExcC14N specification</li>
3054 <li>OSF/1 bug fix by Bjorn</li>
3057 <h3>2.4.20: Apr 15 2002</h3>
3059 <li>bug fixes: file descriptor leak, XPath, HTML output, DTD validation</li>
3060 <li>XPath conformance testing by Richard Jinks</li>
3061 <li>Portability fixes: Solaris, MPE/iX, Windows, OSF/1, python bindings,
3065 <h3>2.4.19: Mar 25 2002</h3>
3067 <li>bug fixes: half a dozen XPath bugs, Validation, ISO-Latin to UTF8
3069 <li>portability fixes in the HTTP code</li>
3070 <li>memory allocation checks using valgrind, and profiling tests</li>
3071 <li>revamp of the Windows build and Makefiles</li>
3074 <h3>2.4.18: Mar 18 2002</h3>
3076 <li>bug fixes: tree, SAX, canonicalization, validation, portability,
3078 <li>removed the --with-buffer option it was becoming unmaintainable</li>
3079 <li>serious cleanup of the Python makefiles</li>
3080 <li>speedup patch to XPath very effective for DocBook stylesheets</li>
3081 <li>Fixes for Windows build, cleanup of the documentation</li>
3084 <h3>2.4.17: Mar 8 2002</h3>
3086 <li>a lot of bug fixes, including "namespace nodes have no parents in
3088 <li>fixed/improved the Python wrappers, added more examples and more
3089 regression tests, XPath extension functions can now return node-sets</li>
3090 <li>added the XML Canonicalization support from Aleksey Sanin</li>
3093 <h3>2.4.16: Feb 20 2002</h3>
3095 <li>a lot of bug fixes, most of them were triggered by the XML Testsuite
3096 from OASIS and W3C. Compliance has been significantly improved.</li>
3097 <li>a couple of portability fixes too.</li>
3100 <h3>2.4.15: Feb 11 2002</h3>
3102 <li>Fixed the Makefiles, especially the python module ones</li>
3103 <li>A few bug fixes and cleanup</li>
3104 <li>Includes cleanup</li>
3107 <h3>2.4.14: Feb 8 2002</h3>
3109 <li>Change of License to the <a
3110 href="http://www.opensource.org/licenses/mit-license.html">MIT
3111 License</a> basically for integration in XFree86 codebase, and removing
3112 confusion around the previous dual-licensing</li>
3113 <li>added Python bindings, beta software but should already be quite
3115 <li>a large number of fixes and cleanups, especially for all tree
3117 <li>cleanup of the headers, generation of a reference API definition in
3121 <h3>2.4.13: Jan 14 2002</h3>
3123 <li>update of the documentation: John Fleck and Charlie Bozeman</li>
3124 <li>cleanup of timing code from Justin Fletcher</li>
3125 <li>fixes for Windows and initial thread support on Win32: Igor and Serguei
3127 <li>Cygwin patch from Robert Collins</li>
3128 <li>added xmlSetEntityReferenceFunc() for Keith Isdale work on xsldbg</li>
3131 <h3>2.4.12: Dec 7 2001</h3>
3133 <li>a few bug fixes: thread (Gary Pennington), xmllint (Geert Kloosterman),
3134 XML parser (Robin Berjon), XPointer (Danny Jamshy), I/O cleanups
3136 <li>Eric Lavigne contributed project files for MacOS</li>
3137 <li>some makefiles cleanups</li>
3140 <h3>2.4.11: Nov 26 2001</h3>
3142 <li>fixed a couple of errors in the includes, fixed a few bugs, some code
3144 <li>xmllint man pages improvement by Heiko Rupp</li>
3145 <li>updated VMS build instructions from John A Fotheringham</li>
3146 <li>Windows Makefiles updates from Igor</li>
3149 <h3>2.4.10: Nov 10 2001</h3>
3151 <li>URI escaping fix (Joel Young)</li>
3152 <li>added xmlGetNodePath() (for paths or XPointers generation)</li>
3153 <li>Fixes namespace handling problems when using DTD and validation</li>
3154 <li>improvements on xmllint: Morus Walter patches for --format and
3155 --encode, Stefan Kost and Heiko Rupp improvements on the --shell</li>
3156 <li>fixes for xmlcatalog linking pointed by Weiqi Gao</li>
3157 <li>fixes to the HTML parser</li>
3160 <h3>2.4.9: Nov 6 2001</h3>
3162 <li>fixes more catalog bugs</li>
3163 <li>avoid a compilation problem, improve xmlGetLineNo()</li>
3166 <h3>2.4.8: Nov 4 2001</h3>
3168 <li>fixed SGML catalogs broken in previous release, updated xmlcatalog
3170 <li>fixed a compile errors and some includes troubles.</li>
3173 <h3>2.4.7: Oct 30 2001</h3>
3175 <li>exported some debugging interfaces</li>
3176 <li>serious rewrite of the catalog code</li>
3177 <li>integrated Gary Pennington thread safety patch, added configure option
3178 and regression tests</li>
3179 <li>removed an HTML parser bug</li>
3180 <li>fixed a couple of potentially serious validation bugs</li>
3181 <li>integrated the SGML DocBook support in xmllint</li>
3182 <li>changed the nanoftp anonymous login passwd</li>
3183 <li>some I/O cleanup and a couple of interfaces for Perl wrapper</li>
3184 <li>general bug fixes</li>
3185 <li>updated xmllint man page by John Fleck</li>
3186 <li>some VMS and Windows updates</li>
3189 <h3>2.4.6: Oct 10 2001</h3>
3191 <li>added an updated man pages by John Fleck</li>
3192 <li>portability and configure fixes</li>
3193 <li>an infinite loop on the HTML parser was removed (William)</li>
3194 <li>Windows makefile patches from Igor</li>
3195 <li>fixed half a dozen bugs reported for libxml or libxslt</li>
3196 <li>updated xmlcatalog to be able to modify SGML super catalogs</li>
3199 <h3>2.4.5: Sep 14 2001</h3>
3201 <li>Remove a few annoying bugs in 2.4.4</li>
3202 <li>forces the HTML serializer to output decimal charrefs since some
3203 version of Netscape can't handle hexadecimal ones</li>
3206 <h3>1.8.16: Sep 14 2001</h3>
3208 <li>maintenance release of the old libxml1 branch, couple of bug and
3209 portability fixes</li>
3212 <h3>2.4.4: Sep 12 2001</h3>
3214 <li>added --convert to xmlcatalog, bug fixes and cleanups of XML
3216 <li>a few bug fixes and some portability changes</li>
3217 <li>some documentation cleanups</li>
3220 <h3>2.4.3: Aug 23 2001</h3>
3222 <li>XML Catalog support see the doc</li>
3223 <li>New NaN/Infinity floating point code</li>
3224 <li>A few bug fixes</li>
3227 <h3>2.4.2: Aug 15 2001</h3>
3229 <li>adds xmlLineNumbersDefault() to control line number generation</li>
3230 <li>lot of bug fixes</li>
3231 <li>the Microsoft MSC projects files should now be up to date</li>
3232 <li>inheritance of namespaces from DTD defaulted attributes</li>
3233 <li>fixes a serious potential security bug</li>
3234 <li>added a --format option to xmllint</li>
3237 <h3>2.4.1: July 24 2001</h3>
3239 <li>possibility to keep line numbers in the tree</li>
3240 <li>some computation NaN fixes</li>
3241 <li>extension of the XPath API</li>
3242 <li>cleanup for alpha and ia64 targets</li>
3243 <li>patch to allow saving through HTTP PUT or POST</li>
3246 <h3>2.4.0: July 10 2001</h3>
3248 <li>Fixed a few bugs in XPath, validation, and tree handling.</li>
3249 <li>Fixed XML Base implementation, added a couple of examples to the
3250 regression tests</li>
3251 <li>A bit of cleanup</li>
3254 <h3>2.3.14: July 5 2001</h3>
3256 <li>fixed some entities problems and reduce memory requirement when
3257 substituting them</li>
3258 <li>lots of improvements in the XPath queries interpreter can be
3259 substantially faster</li>
3260 <li>Makefiles and configure cleanups</li>
3261 <li>Fixes to XPath variable eval, and compare on empty node set</li>
3262 <li>HTML tag closing bug fixed</li>
3263 <li>Fixed an URI reference computation problem when validating</li>
3266 <h3>2.3.13: June 28 2001</h3>
3268 <li>2.3.12 configure.in was broken as well as the push mode XML parser</li>
3269 <li>a few more fixes for compilation on Windows MSC by Yon Derek</li>
3272 <h3>1.8.14: June 28 2001</h3>
3274 <li>Zbigniew Chyla gave a patch to use the old XML parser in push mode</li>
3275 <li>Small Makefile fix</li>
3278 <h3>2.3.12: June 26 2001</h3>
3280 <li>lots of cleanup</li>
3281 <li>a couple of validation fix</li>
3282 <li>fixed line number counting</li>
3283 <li>fixed serious problems in the XInclude processing</li>
3284 <li>added support for UTF8 BOM at beginning of entities</li>
3285 <li>fixed a strange gcc optimizer bugs in xpath handling of float, gcc-3.0
3286 miscompile uri.c (William), Thomas Leitner provided a fix for the
3287 optimizer on Tru64</li>
3288 <li>incorporated Yon Derek and Igor Zlatkovic fixes and improvements for
3289 compilation on Windows MSC</li>
3290 <li>update of libxml-doc.el (Felix Natter)</li>
3291 <li>fixed 2 bugs in URI normalization code</li>
3294 <h3>2.3.11: June 17 2001</h3>
3296 <li>updates to trio, Makefiles and configure should fix some portability
3297 problems (alpha)</li>
3298 <li>fixed some HTML serialization problems (pre, script, and block/inline
3299 handling), added encoding aware APIs, cleanup of this code</li>
3300 <li>added xmlHasNsProp()</li>
3301 <li>implemented a specific PI for encoding support in the DocBook SGML
3303 <li>some XPath fixes (-Infinity, / as a function parameter and namespaces
3304 node selection)</li>
3305 <li>fixed a performance problem and an error in the validation code</li>
3306 <li>fixed XInclude routine to implement the recursive behaviour</li>
3307 <li>fixed xmlFreeNode problem when libxml is included statically twice</li>
3308 <li>added --version to xmllint for bug reports</li>
3311 <h3>2.3.10: June 1 2001</h3>
3313 <li>fixed the SGML catalog support</li>
3314 <li>a number of reported bugs got fixed, in XPath, iconv detection,
3315 XInclude processing</li>
3316 <li>XPath string function should now handle unicode correctly</li>
3319 <h3>2.3.9: May 19 2001</h3>
3321 <p>Lots of bugfixes, and added a basic SGML catalog support:
3324 <li>HTML push bugfix #54891 and another patch from Jonas Borgstrom</li>
3325 <li>some serious speed optimization again</li>
3326 <li>some documentation cleanups</li>
3327 <li>trying to get better linking on Solaris (-R)</li>
3328 <li>XPath API cleanup from Thomas Broyer</li>
3329 <li>Validation bug fixed #54631, added a patch from Gary Pennington, fixed
3330 xmlValidGetValidElements()</li>
3331 <li>Added an INSTALL file</li>
3332 <li>Attribute removal added to API: #54433</li>
3333 <li>added a basic support for SGML catalogs</li>
3334 <li>fixed xmlKeepBlanksDefault(0) API</li>
3335 <li>bugfix in xmlNodeGetLang()</li>
3336 <li>fixed a small configure portability problem</li>
3337 <li>fixed an inversion of SYSTEM and PUBLIC identifier in HTML document</li>
3340 <h3>1.8.13: May 14 2001</h3>
3342 <li>bugfixes release of the old libxml1 branch used by Gnome</li>
3345 <h3>2.3.8: May 3 2001</h3>
3347 <li>Integrated an SGML DocBook parser for the Gnome project</li>
3348 <li>Fixed a few things in the HTML parser</li>
3349 <li>Fixed some XPath bugs raised by XSLT use, tried to fix the floating
3350 point portability issue</li>
3351 <li>Speed improvement (8M/s for SAX, 3M/s for DOM, 1.5M/s for
3352 DOM+validation using the XML REC as input and a 700MHz celeron).</li>
3353 <li>incorporated more Windows cleanup</li>
3354 <li>added xmlSaveFormatFile()</li>
3355 <li>fixed problems in copying nodes with entities references (gdome)</li>
3356 <li>removed some troubles surrounding the new validation module</li>
3359 <h3>2.3.7: April 22 2001</h3>
3361 <li>lots of small bug fixes, corrected XPointer</li>
3362 <li>Non deterministic content model validation support</li>
3363 <li>added xmlDocCopyNode for gdome2</li>
3364 <li>revamped the way the HTML parser handles end of tags</li>
3365 <li>XPath: corrections of namespaces support and number formatting</li>
3366 <li>Windows: Igor Zlatkovic patches for MSC compilation</li>
3367 <li>HTML output fixes from P C Chow and William M. Brack</li>
3368 <li>Improved validation speed sensible for DocBook</li>
3369 <li>fixed a big bug with ID declared in external parsed entities</li>
3370 <li>portability fixes, update of Trio from Bjorn Reese</li>
3373 <h3>2.3.6: April 8 2001</h3>
3375 <li>Code cleanup using extreme gcc compiler warning options, found and
3376 cleared half a dozen potential problem</li>
3377 <li>the Eazel team found an XML parser bug</li>
3378 <li>cleaned up the user of some of the string formatting function. used the
3379 trio library code to provide the one needed when the platform is missing
3381 <li>xpath: removed a memory leak and fixed the predicate evaluation
3382 problem, extended the testsuite and cleaned up the result. XPointer seems
3386 <h3>2.3.5: Mar 23 2001</h3>
3388 <li>Biggest change is separate parsing and evaluation of XPath expressions,
3389 there is some new APIs for this too</li>
3390 <li>included a number of bug fixes(XML push parser, 51876, notations,
3392 <li>Fixed some portability issues</li>
3395 <h3>2.3.4: Mar 10 2001</h3>
3397 <li>Fixed bugs #51860 and #51861</li>
3398 <li>Added a global variable xmlDefaultBufferSize to allow default buffer
3399 size to be application tunable.</li>
3400 <li>Some cleanup in the validation code, still a bug left and this part
3401 should probably be rewritten to support ambiguous content model :-\</li>
3402 <li>Fix a couple of serious bugs introduced or raised by changes in 2.3.3
3404 <li>Fixed another bug in xmlNodeGetContent()</li>
3405 <li>Bjorn fixed XPath node collection and Number formatting</li>
3406 <li>Fixed a loop reported in the HTML parsing</li>
3407 <li>blank space are reported even if the Dtd content model proves that they
3408 are formatting spaces, this is for XML conformance</li>
3411 <h3>2.3.3: Mar 1 2001</h3>
3413 <li>small change in XPath for XSLT</li>
3414 <li>documentation cleanups</li>
3415 <li>fix in validation by Gary Pennington</li>
3416 <li>serious parsing performances improvements</li>
3419 <h3>2.3.2: Feb 24 2001</h3>
3421 <li>chasing XPath bugs, found a bunch, completed some TODO</li>
3422 <li>fixed a Dtd parsing bug</li>
3423 <li>fixed a bug in xmlNodeGetContent</li>
3424 <li>ID/IDREF support partly rewritten by Gary Pennington</li>
3427 <h3>2.3.1: Feb 15 2001</h3>
3429 <li>some XPath and HTML bug fixes for XSLT</li>
3430 <li>small extension of the hash table interfaces for DOM gdome2
3432 <li>A few bug fixes</li>
3435 <h3>2.3.0: Feb 8 2001 (2.2.12 was on 25 Jan but I didn't kept track)</h3>
3437 <li>Lots of XPath bug fixes</li>
3438 <li>Add a mode with Dtd lookup but without validation error reporting for
3440 <li>Add support for text node without escaping (XSLT)</li>
3441 <li>bug fixes for xmlCheckFilename</li>
3442 <li>validation code bug fixes from Gary Pennington</li>
3443 <li>Patch from Paul D. Smith correcting URI path normalization</li>
3444 <li>Patch to allow simultaneous install of libxml-devel and
3446 <li>the example Makefile is now fixed</li>
3447 <li>added HTML to the RPM packages</li>
3448 <li>tree copying bugfixes</li>
3449 <li>updates to Windows makefiles</li>
3450 <li>optimization patch from Bjorn Reese</li>
3453 <h3>2.2.11: Jan 4 2001</h3>
3455 <li>bunch of bug fixes (memory I/O, xpath, ftp/http, ...)</li>
3456 <li>added htmlHandleOmittedElem()</li>
3457 <li>Applied Bjorn Reese's IPV6 first patch</li>
3458 <li>Applied Paul D. Smith patches for validation of XInclude results</li>
3459 <li>added XPointer xmlns() new scheme support</li>
3462 <h3>2.2.10: Nov 25 2000</h3>
3464 <li>Fix the Windows problems of 2.2.8</li>
3465 <li>integrate OpenVMS patches</li>
3466 <li>better handling of some nasty HTML input</li>
3467 <li>Improved the XPointer implementation</li>
3468 <li>integrate a number of provided patches</li>
3471 <h3>2.2.9: Nov 25 2000</h3>
3473 <li>erroneous release :-(</li>
3476 <h3>2.2.8: Nov 13 2000</h3>
3478 <li>First version of <a href="http://www.w3.org/TR/xinclude">XInclude</a>
3480 <li>Patch in conditional section handling</li>
3481 <li>updated MS compiler project</li>
3482 <li>fixed some XPath problems</li>
3483 <li>added an URI escaping function</li>
3484 <li>some other bug fixes</li>
3487 <h3>2.2.7: Oct 31 2000</h3>
3489 <li>added message redirection</li>
3490 <li>XPath improvements (thanks TOM !)</li>
3491 <li>xmlIOParseDTD() added</li>
3492 <li>various small fixes in the HTML, URI, HTTP and XPointer support</li>
3493 <li>some cleanup of the Makefile, autoconf and the distribution content</li>
3496 <h3>2.2.6: Oct 25 2000:</h3>
3498 <li>Added an hash table module, migrated a number of internal structure to
3500 <li>Fixed a posteriori validation problems</li>
3501 <li>HTTP module cleanups</li>
3502 <li>HTML parser improvements (tag errors, script/style handling, attribute
3504 <li>coalescing of adjacent text nodes</li>
3505 <li>couple of XPath bug fixes, exported the internal API</li>
3508 <h3>2.2.5: Oct 15 2000:</h3>
3510 <li>XPointer implementation and testsuite</li>
3511 <li>Lot of XPath fixes, added variable and functions registration, more
3513 <li>Portability fixes, lots of enhancements toward an easy Windows build
3515 <li>Late validation fixes</li>
3516 <li>Integrated a lot of contributed patches</li>
3517 <li>added memory management docs</li>
3518 <li>a performance problem when using large buffer seems fixed</li>
3521 <h3>2.2.4: Oct 1 2000:</h3>
3523 <li>main XPath problem fixed</li>
3524 <li>Integrated portability patches for Windows</li>
3525 <li>Serious bug fixes on the URI and HTML code</li>
3528 <h3>2.2.3: Sep 17 2000</h3>
3531 <li>cleanup of entity handling code</li>
3532 <li>overall review of all loops in the parsers, all sprintf usage has been
3534 <li>Far better handling of larges Dtd. Validating against DocBook XML Dtd
3535 works smoothly now.</li>
3538 <h3>1.8.10: Sep 6 2000</h3>
3540 <li>bug fix release for some Gnome projects</li>
3543 <h3>2.2.2: August 12 2000</h3>
3545 <li>mostly bug fixes</li>
3546 <li>started adding routines to access xml parser context options</li>
3549 <h3>2.2.1: July 21 2000</h3>
3551 <li>a purely bug fixes release</li>
3552 <li>fixed an encoding support problem when parsing from a memory block</li>
3553 <li>fixed a DOCTYPE parsing problem</li>
3554 <li>removed a bug in the function allowing to override the memory
3555 allocation routines</li>
3558 <h3>2.2.0: July 14 2000</h3>
3560 <li>applied a lot of portability fixes</li>
3561 <li>better encoding support/cleanup and saving (content is now always
3562 encoded in UTF-8)</li>
3563 <li>the HTML parser now correctly handles encodings</li>
3564 <li>added xmlHasProp()</li>
3565 <li>fixed a serious problem with &#38;</li>
3566 <li>propagated the fix to FTP client</li>
3567 <li>cleanup, bugfixes, etc ...</li>
3568 <li>Added a page about <a href="encoding.html">libxml Internationalization
3572 <h3>1.8.9: July 9 2000</h3>
3574 <li>fixed the spec the RPMs should be better</li>
3575 <li>fixed a serious bug in the FTP implementation, released 1.8.9 to solve
3576 rpmfind users problem</li>
3579 <h3>2.1.1: July 1 2000</h3>
3581 <li>fixes a couple of bugs in the 2.1.0 packaging</li>
3582 <li>improvements on the HTML parser</li>
3585 <h3>2.1.0 and 1.8.8: June 29 2000</h3>
3587 <li>1.8.8 is mostly a commodity package for upgrading to libxml2 according
3588 to <a href="upgrade.html">new instructions</a>. It fixes a nasty problem
3589 about &#38; charref parsing</li>
3590 <li>2.1.0 also ease the upgrade from libxml v1 to the recent version. it
3591 also contains numerous fixes and enhancements:
3593 <li>added xmlStopParser() to stop parsing</li>
3594 <li>improved a lot parsing speed when there is large CDATA blocs</li>
3595 <li>includes XPath patches provided by Picdar Technology</li>
3596 <li>tried to fix as much as possible DTD validation and namespace
3597 related problems</li>
3598 <li>output to a given encoding has been added/tested</li>
3599 <li>lot of various fixes</li>
3604 <h3>2.0.0: Apr 12 2000</h3>
3606 <li>First public release of libxml2. If you are using libxml, it's a good
3607 idea to check the 1.x to 2.x upgrade instructions. NOTE: while initially
3608 scheduled for Apr 3 the release occurred only on Apr 12 due to massive
3610 <li>The include are now located under $prefix/include/libxml (instead of
3611 $prefix/include/gnome-xml), they also are referenced by
3612 <pre>#include <libxml/xxx.h></pre>
3614 <pre>#include "xxx.h"</pre>
3616 <li>a new URI module for parsing URIs and following strictly RFC 2396</li>
3617 <li>the memory allocation routines used by libxml can now be overloaded
3618 dynamically by using xmlMemSetup()</li>
3619 <li>The previously CVS only tool tester has been renamed
3620 <strong>xmllint</strong> and is now installed as part of the libxml2
3622 <li>The I/O interface has been revamped. There is now ways to plug in
3623 specific I/O modules, either at the URI scheme detection level using
3624 xmlRegisterInputCallbacks() or by passing I/O functions when creating a
3625 parser context using xmlCreateIOParserCtxt()</li>
3626 <li>there is a C preprocessor macro LIBXML_VERSION providing the version
3627 number of the libxml module in use</li>
3628 <li>a number of optional features of libxml can now be excluded at
3629 configure time (FTP/HTTP/HTML/XPath/Debug)</li>
3632 <h3>2.0.0beta: Mar 14 2000</h3>
3634 <li>This is a first Beta release of libxml version 2</li>
3635 <li>It's available only from<a href="ftp://xmlsoft.org/libxml2/">xmlsoft.org
3636 FTP</a>, it's packaged as libxml2-2.0.0beta and available as tar and
3638 <li>This version is now the head in the Gnome CVS base, the old one is
3639 available under the tag LIB_XML_1_X</li>
3640 <li>This includes a very large set of changes. From a programmatic point
3641 of view applications should not have to be modified too much, check the
3642 <a href="upgrade.html">upgrade page</a></li>
3643 <li>Some interfaces may changes (especially a bit about encoding).</li>
3644 <li>the updates includes:
3646 <li>fix I18N support. ISO-Latin-x/UTF-8/UTF-16 (nearly) seems correctly
3648 <li>Better handling of entities, especially well-formedness checking
3649 and proper PEref extensions in external subsets</li>
3650 <li>DTD conditional sections</li>
3651 <li>Validation now correctly handle entities content</li>
3652 <li><a href="http://rpmfind.net/tools/gdome/messages/0039.html">change
3653 structures to accommodate DOM</a></li>
3656 <li>Serious progress were made toward compliance, <a
3657 href="conf/result.html">here are the result of the test</a> against the
3658 OASIS testsuite (except the Japanese tests since I don't support that
3659 encoding yet). This URL is rebuilt every couple of hours using the CVS
3663 <h3>1.8.7: Mar 6 2000</h3>
3665 <li>This is a bug fix release:</li>
3666 <li>It is possible to disable the ignorable blanks heuristic used by
3667 libxml-1.x, a new function xmlKeepBlanksDefault(0) will allow this. Note
3668 that for adherence to XML spec, this behaviour will be disabled by
3669 default in 2.x . The same function will allow to keep compatibility for
3671 <li>Blanks in <a> </a> constructs are not ignored anymore,
3672 avoiding heuristic is really the Right Way :-\</li>
3673 <li>The unchecked use of snprintf which was breaking libxml-1.8.6
3674 compilation on some platforms has been fixed</li>
3675 <li>nanoftp.c nanohttp.c: Fixed '#' and '?' stripping when processing
3679 <h3>1.8.6: Jan 31 2000</h3>
3681 <li>added a nanoFTP transport module, debugged until the new version of <a
3682 href="http://rpmfind.net/linux/rpm2html/rpmfind.html">rpmfind</a> can use
3683 it without troubles</li>
3686 <h3>1.8.5: Jan 21 2000</h3>
3688 <li>adding APIs to parse a well balanced chunk of XML (production <a
3689 href="http://www.w3.org/TR/REC-xml#NT-content">[43] content</a> of the
3691 <li>fixed a hideous bug in xmlGetProp pointed by Rune.Djurhuus@fast.no</li>
3692 <li>Jody Goldberg <jgoldberg@home.com> provided another patch trying
3693 to solve the zlib checks problems</li>
3694 <li>The current state in gnome CVS base is expected to ship as 1.8.5 with
3698 <h3>1.8.4: Jan 13 2000</h3>
3700 <li>bug fixes, reintroduced xmlNewGlobalNs(), fixed xmlNewNs()</li>
3701 <li>all exit() call should have been removed from libxml</li>
3702 <li>fixed a problem with INCLUDE_WINSOCK on WIN32 platform</li>
3703 <li>added newDocFragment()</li>
3706 <h3>1.8.3: Jan 5 2000</h3>
3708 <li>a Push interface for the XML and HTML parsers</li>
3709 <li>a shell-like interface to the document tree (try tester --shell :-)</li>
3710 <li>lots of bug fixes and improvement added over XMas holidays</li>
3711 <li>fixed the DTD parsing code to work with the xhtml DTD</li>
3712 <li>added xmlRemoveProp(), xmlRemoveID() and xmlRemoveRef()</li>
3713 <li>Fixed bugs in xmlNewNs()</li>
3714 <li>External entity loading code has been revamped, now it uses
3715 xmlLoadExternalEntity(), some fix on entities processing were added</li>
3716 <li>cleaned up WIN32 includes of socket stuff</li>
3719 <h3>1.8.2: Dec 21 1999</h3>
3721 <li>I got another problem with includes and C++, I hope this issue is fixed
3722 for good this time</li>
3723 <li>Added a few tree modification functions: xmlReplaceNode,
3724 xmlAddPrevSibling, xmlAddNextSibling, xmlNodeSetName and
3725 xmlDocSetRootElement</li>
3726 <li>Tried to improve the HTML output with help from <a
3727 href="mailto:clahey@umich.edu">Chris Lahey</a></li>
3730 <h3>1.8.1: Dec 18 1999</h3>
3732 <li>various patches to avoid troubles when using libxml with C++ compilers
3733 the "namespace" keyword and C escaping in include files</li>
3734 <li>a problem in one of the core macros IS_CHAR was corrected</li>
3735 <li>fixed a bug introduced in 1.8.0 breaking default namespace processing,
3736 and more specifically the Dia application</li>
3737 <li>fixed a posteriori validation (validation after parsing, or by using a
3738 Dtd not specified in the original document)</li>
3739 <li>fixed a bug in</li>
3742 <h3>1.8.0: Dec 12 1999</h3>
3744 <li>cleanup, especially memory wise</li>
3745 <li>the parser should be more reliable, especially the HTML one, it should
3746 not crash, whatever the input !</li>
3747 <li>Integrated various patches, especially a speedup improvement for large
3748 dataset from <a href="mailto:cnygard@bellatlantic.net">Carl Nygard</a>,
3749 configure with --with-buffers to enable them.</li>
3750 <li>attribute normalization, oops should have been added long ago !</li>
3751 <li>attributes defaulted from DTDs should be available, xmlSetProp() now
3752 does entities escaping by default.</li>
3755 <h3>1.7.4: Oct 25 1999</h3>
3757 <li>Lots of HTML improvement</li>
3758 <li>Fixed some errors when saving both XML and HTML</li>
3759 <li>More examples, the regression tests should now look clean</li>
3760 <li>Fixed a bug with contiguous charref</li>
3763 <h3>1.7.3: Sep 29 1999</h3>
3765 <li>portability problems fixed</li>
3766 <li>snprintf was used unconditionally, leading to link problems on system
3767 were it's not available, fixed</li>
3770 <h3>1.7.1: Sep 24 1999</h3>
3772 <li>The basic type for strings manipulated by libxml has been renamed in
3773 1.7.1 from <strong>CHAR</strong> to <strong>xmlChar</strong>. The reason
3774 is that CHAR was conflicting with a predefined type on Windows. However
3775 on non WIN32 environment, compatibility is provided by the way of a
3776 <strong>#define </strong>.</li>
3777 <li>Changed another error : the use of a structure field called errno, and
3778 leading to troubles on platforms where it's a macro</li>
3781 <h3>1.7.0: Sep 23 1999</h3>
3783 <li>Added the ability to fetch remote DTD or parsed entities, see the <a
3784 href="html/libxml-nanohttp.html">nanohttp</a> module.</li>
3785 <li>Added an errno to report errors by another mean than a simple printf
3787 <li>Finished ID/IDREF support and checking when validation</li>
3788 <li>Serious memory leaks fixed (there is now a <a
3789 href="html/libxml-xmlmemory.html">memory wrapper</a> module)</li>
3790 <li>Improvement of <a href="http://www.w3.org/TR/xpath">XPath</a>
3792 <li>Added an HTML parser front-end</li>
3795 <h2><a name="XML">XML</a></h2>
3797 <p><a href="http://www.w3.org/TR/REC-xml">XML is a standard</a> for
3798 markup-based structured documents. Here is <a name="example">an example XML
3800 <pre><?xml version="1.0"?>
3801 <EXAMPLE prop1="gnome is great" prop2="&amp; linux too">
3803 <title>Welcome to Gnome</title>
3806 <title>The Linux adventure</title>
3807 <p>bla bla bla ...</p>
3808 <image href="linus.gif"/>
3809 <p>...</p>
3811 </EXAMPLE></pre>
3813 <p>The first line specifies that it is an XML document and gives useful
3814 information about its encoding. Then the rest of the document is a text
3815 format whose structure is specified by tags between brackets. <strong>Each
3816 tag opened has to be closed</strong>. XML is pedantic about this. However, if
3817 a tag is empty (no content), a single tag can serve as both the opening and
3818 closing tag if it ends with <code>/></code> rather than with
3819 <code>></code>. Note that, for example, the image tag has no content (just
3820 an attribute) and is closed by ending the tag with <code>/></code>.</p>
3822 <p>XML can be applied successfully to a wide range of tasks, ranging from
3823 long term structured document maintenance (where it follows the steps of
3824 SGML) to simple data encoding mechanisms like configuration file formatting
3825 (glade), spreadsheets (gnumeric), or even shorter lived documents such as
3826 WebDAV where it is used to encode remote calls between a client and a
3829 <h2><a name="XSLT">XSLT</a></h2>
3831 <p>Check <a href="http://xmlsoft.org/XSLT">the separate libxslt page</a></p>
3833 <p><a href="http://www.w3.org/TR/xslt">XSL Transformations</a>, is a
3834 language for transforming XML documents into other XML documents (or
3835 HTML/textual output).</p>
3837 <p>A separate library called libxslt is available implementing XSLT-1.0 for
3838 libxml2. This module "libxslt" too can be found in the Gnome SVN base.</p>
3840 <p>You can check the progresses on the libxslt <a
3841 href="http://xmlsoft.org/XSLT/ChangeLog.html">Changelog</a>.</p>
3843 <h2><a name="Python">Python and bindings</a></h2>
3845 <p>There are a number of language bindings and wrappers available for
3846 libxml2, the list below is not exhaustive. Please contact the <a
3847 href="http://mail.gnome.org/mailman/listinfo/xml-bindings">xml-bindings@gnome.org</a>
3848 (<a href="http://mail.gnome.org/archives/xml-bindings/">archives</a>) in
3849 order to get updates to this list or to discuss the specific topic of libxml2
3850 or libxslt wrappers or bindings:</p>
3852 <li><a href="http://libxmlplusplus.sourceforge.net/">Libxml++</a> seems the
3853 most up-to-date C++ bindings for libxml2, check the <a
3854 href="http://libxmlplusplus.sourceforge.net/reference/html/hierarchy.html">documentation</a>
3856 href="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/libxmlplusplus/libxml%2b%2b/examples/">examples</a>.</li>
3857 <li>There is another <a href="http://libgdome-cpp.berlios.de/">C++ wrapper
3858 based on the gdome2 bindings</a> maintained by Tobias Peters.</li>
3859 <li>and a third C++ wrapper by Peter Jones <pjones@pmade.org>
3861 href="http://pmade.org/pjones/software/xmlwrapp/">http://pmade.org/pjones/software/xmlwrapp/</a></p>
3863 <li>XML::LibXML <a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl
3864 bindings</a> are available on CPAN, as well as XML::LibXSLT
3865 <a href="http://cpan.uwinnipeg.ca/dist/XML-LibXSLT">Perl libxslt
3867 <li>If you're interested into scripting XML processing, have a look at <a
3868 href="http://xsh.sourceforge.net/">XSH</a> an XML editing shell based on
3869 Libxml2 Perl bindings.</li>
3870 <li><a href="mailto:dkuhlman@cutter.rexx.com">Dave Kuhlman</a> provides an
3871 earlier version of the libxml/libxslt <a
3872 href="http://www.rexx.com/~dkuhlman">wrappers for Python</a>.</li>
3873 <li>Gopal.V and Peter Minten develop <a
3874 href="http://savannah.gnu.org/projects/libxmlsharp">libxml#</a>, a set of
3875 C# libxml2 bindings.</li>
3876 <li>Petr Kozelka provides <a
3877 href="http://sourceforge.net/projects/libxml2-pas">Pascal units to glue
3878 libxml2</a> with Kylix, Delphi and other Pascal compilers.</li>
3879 <li>Uwe Fechner also provides <a
3880 href="http://sourceforge.net/projects/idom2-pas/">idom2</a>, a DOM2
3881 implementation for Kylix2/D5/D6 from Borland.</li>
3882 <li>There is <a href="http://libxml.rubyforge.org/">bindings for Ruby</a>
3883 and libxml2 bindings are also available in Ruby through the <a
3884 href="http://libgdome-ruby.berlios.de/">libgdome-ruby</a> module
3885 maintained by Tobias Peters.</li>
3886 <li>Steve Ball and contributors maintains <a
3887 href="http://tclxml.sourceforge.net/">libxml2 and libxslt bindings for
3889 <li>libxml2 and libxslt are the default XML libraries for PHP5.</li>
3890 <li><a href="http://savannah.gnu.org/projects/classpathx/">LibxmlJ</a> is
3891 an effort to create a 100% JAXP-compatible Java wrapper for libxml2 and
3892 libxslt as part of GNU ClasspathX project.</li>
3893 <li>Patrick McPhee provides Rexx bindings fof libxml2 and libxslt, look for
3894 <a href="http://www.interlog.com/~ptjm/software.html">RexxXML</a>.</li>
3896 href="http://www.satimage.fr/software/en/xml_suite.html">Satimage</a>
3898 href="http://www.satimage.fr/software/en/downloads_osaxen.html">XMLLib
3899 osax</a>. This is an osax for Mac OS X with a set of commands to
3900 implement in AppleScript the XML DOM, XPATH and XSLT. Also includes
3901 commands for Property-lists (Apple's fast lookup table XML format.)</li>
3902 <li>Francesco Montorsi developped <a
3903 href="https://sourceforge.net/project/showfiles.php?group_id=51305&package_id=45182">wxXml2</a>
3904 wrappers that interface libxml2, allowing wxWidgets applications to
3905 load/save/edit XML instances.</li>
3908 <p>The distribution includes a set of Python bindings, which are guaranteed
3909 to be maintained as part of the library in the future, though the Python
3910 interface have not yet reached the completeness of the C API.</p>
3912 <p>Note that some of the Python purist dislike the default set of Python
3913 bindings, rather than complaining I suggest they have a look at <a
3914 href="http://lxml.de/">lxml the more pythonic bindings for libxml2
3915 and libxslt</a> and <a
3916 href="http://lxml.de/mailinglist/">check the mailing-list</a>.</p>
3918 <p><a href="mailto:stephane.bidoul@softwareag.com">Stéphane Bidoul</a>
3919 maintains <a href="http://users.skynet.be/sbi/libxml-python/">a Windows port
3920 of the Python bindings</a>.</p>
3922 <p>Note to people interested in building bindings, the API is formalized as
3923 <a href="libxml2-api.xml">an XML API description file</a> which allows to
3924 automate a large part of the Python bindings, this includes function
3925 descriptions, enums, structures, typedefs, etc... The Python script used to
3926 build the bindings is python/generator.py in the source distribution.</p>
3928 <p>To install the Python bindings there are 2 options:</p>
3930 <li>If you use an RPM based distribution, simply install the <a
3931 href="http://rpmfind.net/linux/rpm2html/search.php?query=libxml2-python">libxml2-python
3932 RPM</a> (and if needed the <a
3933 href="http://rpmfind.net/linux/rpm2html/search.php?query=libxslt-python">libxslt-python
3935 <li>Otherwise use the <a href="ftp://xmlsoft.org/libxml2/python/">libxml2-python
3936 module distribution</a> corresponding to your installed version of
3937 libxml2 and libxslt. Note that to install it you will need both libxml2
3938 and libxslt installed and run "python setup.py build install" in the
3942 <p>The distribution includes a set of examples and regression tests for the
3943 python bindings in the <code>python/tests</code> directory. Here are some
3944 excerpts from those tests:</p>
3948 <p>This is a basic test of the file interface and DOM navigation:</p>
3949 <pre>import libxml2, sys
3951 doc = libxml2.parseFile("tst.xml")
3952 if doc.name != "tst.xml":
3953 print "doc.name failed"
3956 if root.name != "doc":
3957 print "root.name failed"
3959 child = root.children
3960 if child.name != "foo":
3961 print "child.name failed"
3965 <p>The Python module is called libxml2; parseFile is the equivalent of
3966 xmlParseFile (most of the bindings are automatically generated, and the xml
3967 prefix is removed and the casing convention are kept). All node seen at the
3968 binding level share the same subset of accessors:</p>
3970 <li><code>name</code> : returns the node name</li>
3971 <li><code>type</code> : returns a string indicating the node type</li>
3972 <li><code>content</code> : returns the content of the node, it is based on
3973 xmlNodeGetContent() and hence is recursive.</li>
3974 <li><code>parent</code> , <code>children</code>, <code>last</code>,
3975 <code>next</code>, <code>prev</code>, <code>doc</code>,
3976 <code>properties</code>: pointing to the associated element in the tree,
3977 those may return None in case no such link exists.</li>
3980 <p>Also note the need to explicitly deallocate documents with freeDoc() .
3981 Reference counting for libxml2 trees would need quite a lot of work to
3982 function properly, and rather than risk memory leaks if not implemented
3983 correctly it sounds safer to have an explicit function to free a tree. The
3984 wrapper python objects like doc, root or child are them automatically garbage
3987 <h3>validate.py:</h3>
3989 <p>This test check the validation interfaces and redirection of error
3993 #deactivate error messages from the validation
3994 def noerr(ctx, str):
3997 libxml2.registerErrorHandler(noerr, None)
3999 ctxt = libxml2.createFileParserCtxt("invalid.xml")
4001 ctxt.parseDocument()
4003 valid = ctxt.isValid()
4006 print "validity check failed"</pre>
4008 <p>The first thing to notice is the call to registerErrorHandler(), it
4009 defines a new error handler global to the library. It is used to avoid seeing
4010 the error messages when trying to validate the invalid document.</p>
4012 <p>The main interest of that test is the creation of a parser context with
4013 createFileParserCtxt() and how the behaviour can be changed before calling
4014 parseDocument() . Similarly the information resulting from the parsing phase
4015 is also available using context methods.</p>
4017 <p>Contexts like nodes are defined as class and the libxml2 wrappers maps the
4018 C function interfaces in terms of objects method as much as possible. The
4019 best to get a complete view of what methods are supported is to look at the
4020 libxml2.py module containing all the wrappers.</p>
4024 <p>This test show how to activate the push parser interface:</p>
4027 ctxt = libxml2.createPushParser(None, "<foo", 4, "test.xml")
4028 ctxt.parseChunk("/>", 2, 1)
4033 <p>The context is created with a special call based on the
4034 xmlCreatePushParser() from the C library. The first argument is an optional
4035 SAX callback object, then the initial set of data, the length and the name of
4036 the resource in case URI-References need to be computed by the parser.</p>
4038 <p>Then the data are pushed using the parseChunk() method, the last call
4039 setting the third argument terminate to 1.</p>
4041 <h3>pushSAX.py:</h3>
4043 <p>this test show the use of the event based parsing interfaces. In this case
4044 the parser does not build a document, but provides callback information as
4045 the parser makes progresses analyzing the data being provided:</p>
4050 def startDocument(self):
4052 log = log + "startDocument:"
4054 def endDocument(self):
4056 log = log + "endDocument:"
4058 def startElement(self, tag, attrs):
4060 log = log + "startElement %s %s:" % (tag, attrs)
4062 def endElement(self, tag):
4064 log = log + "endElement %s:" % (tag)
4066 def characters(self, data):
4068 log = log + "characters: %s:" % (data)
4070 def warning(self, msg):
4072 log = log + "warning: %s:" % (msg)
4074 def error(self, msg):
4076 log = log + "error: %s:" % (msg)
4078 def fatalError(self, msg):
4080 log = log + "fatalError: %s:" % (msg)
4082 handler = callback()
4084 ctxt = libxml2.createPushParser(handler, "<foo", 4, "test.xml")
4085 chunk = " url='tst'>b"
4086 ctxt.parseChunk(chunk, len(chunk), 0)
4087 chunk = "ar</foo>"
4088 ctxt.parseChunk(chunk, len(chunk), 1)
4090 reference = "startDocument:startElement foo {'url': 'tst'}:" + \
4091 "characters: bar:endElement foo:endDocument:"
4092 if log != reference:
4093 print "Error got: %s" % log
4094 print "Expected: %s" % reference</pre>
4096 <p>The key object in that test is the handler, it provides a number of entry
4097 points which can be called by the parser as it makes progresses to indicate
4098 the information set obtained. The full set of callback is larger than what
4099 the callback class in that specific example implements (see the SAX
4100 definition for a complete list). The wrapper will only call those supplied by
4101 the object when activated. The startElement receives the names of the element
4102 and a dictionary containing the attributes carried by this element.</p>
4104 <p>Also note that the reference string generated from the callback shows a
4105 single character call even though the string "bar" is passed to the parser
4106 from 2 different call to parseChunk()</p>
4110 <p>This is a basic test of XPath wrappers support</p>
4113 doc = libxml2.parseFile("tst.xml")
4114 ctxt = doc.xpathNewContext()
4115 res = ctxt.xpathEval("//*")
4117 print "xpath query: wrong node set size"
4119 if res[0].name != "doc" or res[1].name != "foo":
4120 print "xpath query: wrong node set value"
4123 ctxt.xpathFreeContext()</pre>
4125 <p>This test parses a file, then create an XPath context to evaluate XPath
4126 expression on it. The xpathEval() method execute an XPath query and returns
4127 the result mapped in a Python way. String and numbers are natively converted,
4128 and node sets are returned as a tuple of libxml2 Python nodes wrappers. Like
4129 the document, the XPath context need to be freed explicitly, also not that
4130 the result of the XPath query may point back to the document tree and hence
4131 the document must be freed after the result of the query is used.</p>
4133 <h3>xpathext.py:</h3>
4135 <p>This test shows how to extend the XPath engine with functions written in
4142 doc = libxml2.parseFile("tst.xml")
4143 ctxt = doc.xpathNewContext()
4144 libxml2.registerXPathFunction(ctxt._o, "foo", None, foo)
4145 res = ctxt.xpathEval("foo(1)")
4147 print "xpath extension failure"
4149 ctxt.xpathFreeContext()</pre>
4151 <p>Note how the extension function is registered with the context (but that
4152 part is not yet finalized, this may change slightly in the future).</p>
4154 <h3>tstxpath.py:</h3>
4156 <p>This test is similar to the previous one but shows how the extension
4157 function can access the XPath evaluation context:</p>
4158 <pre>def foo(ctx, x):
4162 # test that access to the XPath evaluation contexts
4164 pctxt = libxml2.xpathParserContext(_obj=ctx)
4165 ctxt = pctxt.context()
4166 called = ctxt.function()
4169 <p>All the interfaces around the XPath parser(or rather evaluation) context
4170 are not finalized, but it should be sufficient to do contextual work at the
4171 evaluation point.</p>
4173 <h3>Memory debugging:</h3>
4175 <p>last but not least, all tests starts with the following prologue:</p>
4176 <pre>#memory debug specific
4177 libxml2.debugMemory(1)</pre>
4179 <p>and ends with the following epilogue:</p>
4180 <pre>#memory debug specific
4181 libxml2.cleanupParser()
4182 if libxml2.debugMemory(1) == 0:
4185 print "Memory leak %d bytes" % (libxml2.debugMemory(1))
4186 libxml2.dumpMemory()</pre>
4188 <p>Those activate the memory debugging interface of libxml2 where all
4189 allocated block in the library are tracked. The prologue then cleans up the
4190 library state and checks that all allocated memory has been freed. If not it
4191 calls dumpMemory() which saves that list in a <code>.memdump</code> file.</p>
4193 <h2><a name="architecture">libxml2 architecture</a></h2>
4195 <p>Libxml2 is made of multiple components; some of them are optional, and
4196 most of the block interfaces are public. The main components are:</p>
4198 <li>an Input/Output layer</li>
4199 <li>FTP and HTTP client layers (optional)</li>
4200 <li>an Internationalization layer managing the encodings support</li>
4201 <li>a URI module</li>
4202 <li>the XML parser and its basic SAX interface</li>
4203 <li>an HTML parser using the same SAX interface (optional)</li>
4204 <li>a SAX tree module to build an in-memory DOM representation</li>
4205 <li>a tree module to manipulate the DOM representation</li>
4206 <li>a validation module using the DOM representation (optional)</li>
4207 <li>an XPath module for global lookup in a DOM representation
4209 <li>a debug module (optional)</li>
4212 <p>Graphically this gives the following:</p>
4214 <p><img src="libxml.gif" alt="a graphical view of the various"></p>
4218 <h2><a name="tree">The tree output</a></h2>
4220 <p>The parser returns a tree built during the document analysis. The value
4221 returned is an <strong>xmlDocPtr</strong> (i.e., a pointer to an
4222 <strong>xmlDoc</strong> structure). This structure contains information such
4223 as the file name, the document type, and a <strong>children</strong> pointer
4224 which is the root of the document (or more exactly the first child under the
4225 root which is the document). The tree is made of <strong>xmlNode</strong>s,
4226 chained in double-linked lists of siblings and with a children<->parent
4227 relationship. An xmlNode can also carry properties (a chain of xmlAttr
4228 structures). An attribute may have a value which is a list of TEXT or
4229 ENTITY_REF nodes.</p>
4231 <p>Here is an example (erroneous with respect to the XML spec since there
4232 should be only one ELEMENT under the root):</p>
4234 <p><img src="structure.gif" alt=" structure.gif "></p>
4236 <p>In the source package there is a small program (not installed by default)
4237 called <strong>xmllint</strong> which parses XML files given as argument and
4238 prints them back as parsed. This is useful for detecting errors both in XML
4239 code and in the XML parser itself. It has an option <strong>--debug</strong>
4240 which prints the actual in-memory structure of the document; here is the
4241 result with the <a href="#example">example</a> given before:</p>
4248 content=gnome is great
4256 content=Welcome to Gnome
4260 content=The Linux adventure
4263 content=bla bla bla ...
4272 <p>This should be useful for learning the internal representation model.</p>
4274 <h2><a name="interface">The SAX interface</a></h2>
4276 <p>Sometimes the DOM tree output is just too large to fit reasonably into
4277 memory. In that case (and if you don't expect to save back the XML document
4278 loaded using libxml), it's better to use the SAX interface of libxml. SAX is
4279 a <strong>callback-based interface</strong> to the parser. Before parsing,
4280 the application layer registers a customized set of callbacks which are
4281 called by the library as it progresses through the XML input.</p>
4283 <p>To get more detailed step-by-step guidance on using the SAX interface of
4285 href="http://www.jamesh.id.au/articles/libxml-sax/libxml-sax.html">nice
4286 documentation</a>.written by <a href="mailto:james@daa.com.au">James
4289 <p>You can debug the SAX behaviour by using the <strong>testSAX</strong>
4290 program located in the gnome-xml module (it's usually not shipped in the
4291 binary packages of libxml, but you can find it in the tar source
4292 distribution). Here is the sequence of callbacks that would be reported by
4293 testSAX when parsing the example XML document shown earlier:</p>
4294 <pre>SAX.setDocumentLocator()
4297 SAX.startElement(EXAMPLE, prop1='gnome is great', prop2='&amp; linux too')
4298 SAX.characters( , 3)
4299 SAX.startElement(head)
4300 SAX.characters( , 4)
4301 SAX.startElement(title)
4302 SAX.characters(Welcome to Gnome, 16)
4303 SAX.endElement(title)
4304 SAX.characters( , 3)
4305 SAX.endElement(head)
4306 SAX.characters( , 3)
4307 SAX.startElement(chapter)
4308 SAX.characters( , 4)
4309 SAX.startElement(title)
4310 SAX.characters(The Linux adventure, 19)
4311 SAX.endElement(title)
4312 SAX.characters( , 4)
4314 SAX.characters(bla bla bla ..., 15)
4316 SAX.characters( , 4)
4317 SAX.startElement(image, href='linus.gif')
4318 SAX.endElement(image)
4319 SAX.characters( , 4)
4321 SAX.characters(..., 3)
4323 SAX.characters( , 3)
4324 SAX.endElement(chapter)
4325 SAX.characters( , 1)
4326 SAX.endElement(EXAMPLE)
4327 SAX.endDocument()</pre>
4329 <p>Most of the other interfaces of libxml2 are based on the DOM tree-building
4330 facility, so nearly everything up to the end of this document presupposes the
4331 use of the standard DOM tree build. Note that the DOM tree itself is built by
4332 a set of registered default callbacks, without internal specific
4335 <h2><a name="Validation">Validation & DTDs</a></h2>
4337 <p>Table of Content:</p>
4339 <li><a href="#General5">General overview</a></li>
4340 <li><a href="#definition">The definition</a></li>
4341 <li><a href="#Simple">Simple rules</a>
4343 <li><a href="#reference">How to reference a DTD from a document</a></li>
4344 <li><a href="#Declaring">Declaring elements</a></li>
4345 <li><a href="#Declaring1">Declaring attributes</a></li>
4348 <li><a href="#Some">Some examples</a></li>
4349 <li><a href="#validate">How to validate</a></li>
4350 <li><a href="#Other">Other resources</a></li>
4353 <h3><a name="General5">General overview</a></h3>
4355 <p>Well what is validation and what is a DTD ?</p>
4357 <p>DTD is the acronym for Document Type Definition. This is a description of
4358 the content for a family of XML files. This is part of the XML 1.0
4359 specification, and allows one to describe and verify that a given document
4360 instance conforms to the set of rules detailing its structure and content.</p>
4362 <p>Validation is the process of checking a document against a DTD (more
4363 generally against a set of construction rules).</p>
4365 <p>The validation process and building DTDs are the two most difficult parts
4366 of the XML life cycle. Briefly a DTD defines all the possible elements to be
4367 found within your document, what is the formal shape of your document tree
4368 (by defining the allowed content of an element; either text, a regular
4369 expression for the allowed list of children, or mixed content i.e. both text
4370 and children). The DTD also defines the valid attributes for all elements and
4371 the types of those attributes.</p>
4373 <h3><a name="definition1">The definition</a></h3>
4375 <p>The <a href="http://www.w3.org/TR/REC-xml">W3C XML Recommendation</a> (<a
4376 href="http://www.xml.com/axml/axml.html">Tim Bray's annotated version of
4379 <li><a href="http://www.w3.org/TR/REC-xml#elemdecls">Declaring
4381 <li><a href="http://www.w3.org/TR/REC-xml#attdecls">Declaring
4385 <p>(unfortunately) all this is inherited from the SGML world, the syntax is
4388 <h3><a name="Simple1">Simple rules</a></h3>
4390 <p>Writing DTDs can be done in many ways. The rules to build them if you need
4391 something permanent or something which can evolve over time can be radically
4392 different. Really complex DTDs like DocBook ones are flexible but quite
4393 harder to design. I will just focus on DTDs for a formats with a fixed simple
4394 structure. It is just a set of basic rules, and definitely not exhaustive nor
4395 usable for complex DTD design.</p>
4397 <h4><a name="reference1">How to reference a DTD from a document</a>:</h4>
4399 <p>Assuming the top element of the document is <code>spec</code> and the dtd
4400 is placed in the file <code>mydtd</code> in the subdirectory
4401 <code>dtds</code> of the directory from where the document were loaded:</p>
4403 <p><code><!DOCTYPE spec SYSTEM "dtds/mydtd"></code></p>
4407 <li>The system string is actually an URI-Reference (as defined in <a
4408 href="http://www.ietf.org/rfc/rfc2396.txt">RFC 2396</a>) so you can use a
4409 full URL string indicating the location of your DTD on the Web. This is a
4410 really good thing to do if you want others to validate your document.</li>
4411 <li>It is also possible to associate a <code>PUBLIC</code> identifier (a
4412 magic string) so that the DTD is looked up in catalogs on the client side
4413 without having to locate it on the web.</li>
4414 <li>A DTD contains a set of element and attribute declarations, but they
4415 don't define what the root of the document should be. This is explicitly
4416 told to the parser/validator as the first element of the
4417 <code>DOCTYPE</code> declaration.</li>
4420 <h4><a name="Declaring2">Declaring elements</a>:</h4>
4422 <p>The following declares an element <code>spec</code>:</p>
4424 <p><code><!ELEMENT spec (front, body, back?)></code></p>
4426 <p>It also expresses that the spec element contains one <code>front</code>,
4427 one <code>body</code> and one optional <code>back</code> children elements in
4428 this order. The declaration of one element of the structure and its content
4429 are done in a single declaration. Similarly the following declares
4430 <code>div1</code> elements:</p>
4432 <p><code><!ELEMENT div1 (head, (p | list | note)*, div2?)></code></p>
4434 <p>which means div1 contains one <code>head</code> then a series of optional
4435 <code>p</code>, <code>list</code>s and <code>note</code>s and then an
4436 optional <code>div2</code>. And last but not least an element can contain
4439 <p><code><!ELEMENT b (#PCDATA)></code></p>
4441 <p><code>b</code> contains text or being of mixed content (text and elements
4442 in no particular order):</p>
4444 <p><code><!ELEMENT p (#PCDATA|a|ul|b|i|em)*></code></p>
4446 <p><code>p </code>can contain text or <code>a</code>, <code>ul</code>,
4447 <code>b</code>, <code>i </code>or <code>em</code> elements in no particular
4450 <h4><a name="Declaring1">Declaring attributes</a>:</h4>
4452 <p>Again the attributes declaration includes their content definition:</p>
4454 <p><code><!ATTLIST termdef name CDATA #IMPLIED></code></p>
4456 <p>means that the element <code>termdef</code> can have a <code>name</code>
4457 attribute containing text (<code>CDATA</code>) and which is optional
4458 (<code>#IMPLIED</code>). The attribute value can also be defined within a
4461 <p><code><!ATTLIST list type (bullets|ordered|glossary)
4462 "ordered"></code></p>
4464 <p>means <code>list</code> element have a <code>type</code> attribute with 3
4465 allowed values "bullets", "ordered" or "glossary" and which default to
4466 "ordered" if the attribute is not explicitly specified.</p>
4468 <p>The content type of an attribute can be text (<code>CDATA</code>),
4469 anchor/reference/references
4470 (<code>ID</code>/<code>IDREF</code>/<code>IDREFS</code>), entity(ies)
4471 (<code>ENTITY</code>/<code>ENTITIES</code>) or name(s)
4472 (<code>NMTOKEN</code>/<code>NMTOKENS</code>). The following defines that a
4473 <code>chapter</code> element can have an optional <code>id</code> attribute
4474 of type <code>ID</code>, usable for reference from attribute of type
4477 <p><code><!ATTLIST chapter id ID #IMPLIED></code></p>
4479 <p>The last value of an attribute definition can be <code>#REQUIRED
4480 </code>meaning that the attribute has to be given, <code>#IMPLIED</code>
4481 meaning that it is optional, or the default value (possibly prefixed by
4482 <code>#FIXED</code> if it is the only allowed).</p>
4486 <li>Usually the attributes pertaining to a given element are declared in a
4487 single expression, but it is just a convention adopted by a lot of DTD
4489 <pre><!ATTLIST termdef
4491 name CDATA #IMPLIED></pre>
4492 <p>The previous construct defines both <code>id</code> and
4493 <code>name</code> attributes for the element <code>termdef</code>.</p>
4497 <h3><a name="Some1">Some examples</a></h3>
4499 <p>The directory <code>test/valid/dtds/</code> in the libxml2 distribution
4500 contains some complex DTD examples. The example in the file
4501 <code>test/valid/dia.xml</code> shows an XML file where the simple DTD is
4502 directly included within the document.</p>
4504 <h3><a name="validate1">How to validate</a></h3>
4506 <p>The simplest way is to use the xmllint program included with libxml. The
4507 <code>--valid</code> option turns-on validation of the files given as input.
4508 For example the following validates a copy of the first revision of the XML
4509 1.0 specification:</p>
4511 <p><code>xmllint --valid --noout test/valid/REC-xml-19980210.xml</code></p>
4513 <p>the -- noout is used to disable output of the resulting tree.</p>
4515 <p>The <code>--dtdvalid dtd</code> allows validation of the document(s)
4516 against a given DTD.</p>
4518 <p>Libxml2 exports an API to handle DTDs and validation, check the <a
4519 href="http://xmlsoft.org/html/libxml-valid.html">associated
4520 description</a>.</p>
4522 <h3><a name="Other1">Other resources</a></h3>
4524 <p>DTDs are as old as SGML. So there may be a number of examples on-line, I
4525 will just list one for now, others pointers welcome:</p>
4527 <li><a href="http://www.xml101.com:8081/dtd/">XML-101 DTD</a></li>
4530 <p>I suggest looking at the examples found under test/valid/dtd and any of
4531 the large number of books available on XML. The dia example in test/valid
4532 should be both simple and complete enough to allow you to build your own.</p>
4536 <h2><a name="Memory">Memory Management</a></h2>
4538 <p>Table of Content:</p>
4540 <li><a href="#General3">General overview</a></li>
4541 <li><a href="#setting">Setting libxml2 set of memory routines</a></li>
4542 <li><a href="#cleanup">Cleaning up after using the library</a></li>
4543 <li><a href="#Debugging">Debugging routines</a></li>
4544 <li><a href="#General4">General memory requirements</a></li>
4545 <li><a href="#Compacting">Returning memory to the kernel</a></li>
4548 <h3><a name="General3">General overview</a></h3>
4550 <p>The module <code><a
4551 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlmemory.h</a></code>
4552 provides the interfaces to the libxml2 memory system:</p>
4554 <li>libxml2 does not use the libc memory allocator directly but xmlFree(),
4555 xmlMalloc() and xmlRealloc()</li>
4556 <li>those routines can be reallocated to a specific set of routine, by
4557 default the libc ones i.e. free(), malloc() and realloc()</li>
4558 <li>the xmlmemory.c module includes a set of debugging routine</li>
4561 <h3><a name="setting">Setting libxml2 set of memory routines</a></h3>
4563 <p>It is sometimes useful to not use the default memory allocator, either for
4564 debugging, analysis or to implement a specific behaviour on memory management
4565 (like on embedded systems). Two function calls are available to do so:</p>
4567 <li><a href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemGet
4568 ()</a> which return the current set of functions in use by the parser</li>
4570 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemSetup()</a>
4571 which allow to set up a new set of memory allocation functions</li>
4574 <p>Of course a call to xmlMemSetup() should probably be done before calling
4575 any other libxml2 routines (unless you are sure your allocations routines are
4578 <h3><a name="cleanup">Cleaning up after using the library</a></h3>
4580 <p>Libxml2 is not stateless, there is a few set of memory structures needing
4581 allocation before the parser is fully functional (some encoding structures
4582 for example). This also mean that once parsing is finished there is a tiny
4583 amount of memory (a few hundred bytes) which can be recollected if you don't
4584 reuse the library or any document built with it:</p>
4586 <li><a href="http://xmlsoft.org/html/libxml-parser.html">xmlCleanupParser
4587 ()</a> is a centralized routine to free the library state and data. Note
4588 that it won't deallocate any produced tree if any (use the xmlFreeDoc()
4589 and related routines for this). This should be called only when the library
4590 is not used anymore.</li>
4591 <li><a href="http://xmlsoft.org/html/libxml-parser.html">xmlInitParser
4592 ()</a> is the dual routine allowing to preallocate the parsing state
4593 which can be useful for example to avoid initialization reentrancy
4594 problems when using libxml2 in multithreaded applications</li>
4597 <p>Generally xmlCleanupParser() is safe assuming no parsing is ongoing and
4598 no document is still being used, if needed the state will be rebuild at the
4599 next invocation of parser routines (or by xmlInitParser()), but be careful
4600 of the consequences in multithreaded applications.</p>
4602 <h3><a name="Debugging">Debugging routines</a></h3>
4604 <p>When configured using --with-mem-debug flag (off by default), libxml2 uses
4605 a set of memory allocation debugging routines keeping track of all allocated
4606 blocks and the location in the code where the routine was called. A couple of
4607 other debugging routines allow to dump the memory allocated infos to a file
4608 or call a specific routine when a given block number is allocated:</p>
4611 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMallocLoc()</a>
4613 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlReallocLoc()</a>
4615 href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemStrdupLoc()</a>
4616 are the memory debugging replacement allocation routines</li>
4617 <li><a href="http://xmlsoft.org/html/libxml-xmlmemory.html">xmlMemoryDump
4618 ()</a> dumps all the information about the allocated memory block lefts
4619 in the <code>.memdump</code> file</li>
4622 <p>When developing libxml2 memory debug is enabled, the tests programs call
4623 xmlMemoryDump () and the "make test" regression tests will check for any
4624 memory leak during the full regression test sequence, this helps a lot
4625 ensuring that libxml2 does not leak memory and bullet proof memory
4626 allocations use (some libc implementations are known to be far too permissive
4627 resulting in major portability problems!).</p>
4629 <p>If the .memdump reports a leak, it displays the allocation function and
4630 also tries to give some information about the content and structure of the
4631 allocated blocks left. This is sufficient in most cases to find the culprit,
4632 but not always. Assuming the allocation problem is reproducible, it is
4633 possible to find more easily:</p>
4635 <li>write down the block number xxxx not allocated</li>
4636 <li>export the environment variable XML_MEM_BREAKPOINT=xxxx , the easiest
4637 when using GDB is to simply give the command
4638 <p><code>set environment XML_MEM_BREAKPOINT xxxx</code></p>
4639 <p>before running the program.</p>
4641 <li>run the program under a debugger and set a breakpoint on
4642 xmlMallocBreakpoint() a specific function called when this precise block
4644 <li>when the breakpoint is reached you can then do a fine analysis of the
4645 allocation an step to see the condition resulting in the missing
4649 <p>I used to use a commercial tool to debug libxml2 memory problems but after
4650 noticing that it was not detecting memory leaks that simple mechanism was
4651 used and proved extremely efficient until now. Lately I have also used <a
4652 href="http://developer.kde.org/~sewardj/">valgrind</a> with quite some
4653 success, it is tied to the i386 architecture since it works by emulating the
4654 processor and instruction set, it is slow but extremely efficient, i.e. it
4655 spot memory usage errors in a very precise way.</p>
4657 <h3><a name="General4">General memory requirements</a></h3>
4659 <p>How much libxml2 memory require ? It's hard to tell in average it depends
4660 of a number of things:</p>
4662 <li>the parser itself should work in a fixed amount of memory, except for
4663 information maintained about the stacks of names and entities locations.
4664 The I/O and encoding handlers will probably account for a few KBytes.
4665 This is true for both the XML and HTML parser (though the HTML parser
4666 need more state).</li>
4667 <li>If you are generating the DOM tree then memory requirements will grow
4668 nearly linear with the size of the data. In general for a balanced
4669 textual document the internal memory requirement is about 4 times the
4670 size of the UTF8 serialization of this document (example the XML-1.0
4671 recommendation is a bit more of 150KBytes and takes 650KBytes of main
4672 memory when parsed). Validation will add a amount of memory required for
4673 maintaining the external Dtd state which should be linear with the
4674 complexity of the content model defined by the Dtd</li>
4675 <li>If you need to work with fixed memory requirements or don't need the
4676 full DOM tree then using the <a href="xmlreader.html">xmlReader
4677 interface</a> is probably the best way to proceed, it still allows to
4678 validate or operate on subset of the tree if needed.</li>
4679 <li>If you don't care about the advanced features of libxml2 like
4680 validation, DOM, XPath or XPointer, don't use entities, need to work with
4681 fixed memory requirements, and try to get the fastest parsing possible
4682 then the SAX interface should be used, but it has known restrictions.</li>
4686 <h3><a name="Compacting">Returning memory to the kernel</a></h3>
4688 <p>You may encounter that your process using libxml2 does not have a
4689 reduced memory usage although you freed the trees. This is because
4690 libxml2 allocates memory in a number of small chunks. When freeing one
4691 of those chunks, the OS may decide that giving this little memory back
4692 to the kernel will cause too much overhead and delay the operation. As
4693 all chunks are this small, they get actually freed but not returned to
4694 the kernel. On systems using glibc, there is a function call
4695 "malloc_trim" from malloc.h which does this missing operation (note that
4696 it is allowed to fail). Thus, after freeing your tree you may simply try
4697 "malloc_trim(0);" to really get the memory back. If your OS does not
4698 provide malloc_trim, try searching for a similar function.</p>
4701 <h2><a name="Encodings">Encodings support</a></h2>
4703 <p>If you are not really familiar with Internationalization (usual shortcut
4704 is I18N) , Unicode, characters and glyphs, I suggest you read a <a
4705 href="http://www.tbray.org/ongoing/When/200x/2003/04/06/Unicode">presentation</a>
4706 by Tim Bray on Unicode and why you should care about it.</p>
4708 <p>If you don't understand why <b>it does not make sense to have a string
4709 without knowing what encoding it uses</b>, then as Joel Spolsky said <a
4710 href="http://www.joelonsoftware.com/articles/Unicode.html">please do not
4711 write another line of code until you finish reading that article.</a>. It is
4712 a prerequisite to understand this page, and avoid a lot of problems with
4713 libxml2, XML or text processing in general.</p>
4715 <p>Table of Content:</p>
4717 <li><a href="encoding.html#What">What does internationalization support
4719 <li><a href="encoding.html#internal">The internal encoding, how and
4721 <li><a href="encoding.html#implemente">How is it implemented ?</a></li>
4722 <li><a href="encoding.html#Default">Default supported encodings</a></li>
4723 <li><a href="encoding.html#extend">How to extend the existing
4727 <h3><a name="What">What does internationalization support mean ?</a></h3>
4729 <p>XML was designed from the start to allow the support of any character set
4730 by using Unicode. Any conformant XML parser has to support the UTF-8 and
4731 UTF-16 default encodings which can both express the full unicode ranges. UTF8
4732 is a variable length encoding whose greatest points are to reuse the same
4733 encoding for ASCII and to save space for Western encodings, but it is a bit
4734 more complex to handle in practice. UTF-16 use 2 bytes per character (and
4735 sometimes combines two pairs), it makes implementation easier, but looks a
4736 bit overkill for Western languages encoding. Moreover the XML specification
4737 allows the document to be encoded in other encodings at the condition that
4738 they are clearly labeled as such. For example the following is a wellformed
4739 XML document encoded in ISO-8859-1 and using accentuated letters that we
4740 French like for both markup and content:</p>
4741 <pre><?xml version="1.0" encoding="ISO-8859-1"?>
4742 <très>là </très></pre>
4744 <p>Having internationalization support in libxml2 means the following:</p>
4746 <li>the document is properly parsed</li>
4747 <li>information about it's encoding is saved</li>
4748 <li>it can be modified</li>
4749 <li>it can be saved in its original encoding</li>
4750 <li>it can also be saved in another encoding supported by libxml2 (for
4751 example straight UTF8 or even an ASCII form)</li>
4754 <p>Another very important point is that the whole libxml2 API, with the
4755 exception of a few routines to read with a specific encoding or save to a
4756 specific encoding, is completely agnostic about the original encoding of the
4759 <p>It should be noted too that the HTML parser embedded in libxml2 now obey
4760 the same rules too, the following document will be (as of 2.2.2) handled in
4761 an internationalized fashion by libxml2 too:</p>
4762 <pre><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
4763 "http://www.w3.org/TR/REC-html40/loose.dtd">
4764 <html lang="fr">
4766 <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1">
4769 <p>W3C crée des standards pour le Web.</body>
4772 <h3><a name="internal">The internal encoding, how and why</a></h3>
4774 <p>One of the core decisions was to force all documents to be converted to a
4775 default internal encoding, and that encoding to be UTF-8, here are the
4776 rationales for those choices:</p>
4778 <li>keeping the native encoding in the internal form would force the libxml
4779 users (or the code associated) to be fully aware of the encoding of the
4780 original document, for examples when adding a text node to a document,
4781 the content would have to be provided in the document encoding, i.e. the
4782 client code would have to check it before hand, make sure it's conformant
4783 to the encoding, etc ... Very hard in practice, though in some specific
4784 cases this may make sense.</li>
4785 <li>the second decision was which encoding. From the XML spec only UTF8 and
4786 UTF16 really makes sense as being the two only encodings for which there
4787 is mandatory support. UCS-4 (32 bits fixed size encoding) could be
4788 considered an intelligent choice too since it's a direct Unicode mapping
4789 support. I selected UTF-8 on the basis of efficiency and compatibility
4790 with surrounding software:
4792 <li>UTF-8 while a bit more complex to convert from/to (i.e. slightly
4793 more costly to import and export CPU wise) is also far more compact
4794 than UTF-16 (and UCS-4) for a majority of the documents I see it used
4795 for right now (RPM RDF catalogs, advogato data, various configuration
4796 file formats, etc.) and the key point for today's computer
4797 architecture is efficient uses of caches. If one nearly double the
4798 memory requirement to store the same amount of data, this will trash
4799 caches (main memory/external caches/internal caches) and my take is
4800 that this harms the system far more than the CPU requirements needed
4801 for the conversion to UTF-8</li>
4802 <li>Most of libxml2 version 1 users were using it with straight ASCII
4803 most of the time, doing the conversion with an internal encoding
4804 requiring all their code to be rewritten was a serious show-stopper
4805 for using UTF-16 or UCS-4.</li>
4806 <li>UTF-8 is being used as the de-facto internal encoding standard for
4807 related code like the <a href="http://www.pango.org/">pango</a>
4808 upcoming Gnome text widget, and a lot of Unix code (yet another place
4809 where Unix programmer base takes a different approach from Microsoft
4810 - they are using UTF-16)</li>
4815 <p>What does this mean in practice for the libxml2 user:</p>
4817 <li>xmlChar, the libxml2 data type is a byte, those bytes must be assembled
4818 as UTF-8 valid strings. The proper way to terminate an xmlChar * string
4819 is simply to append 0 byte, as usual.</li>
4820 <li>One just need to make sure that when using chars outside the ASCII set,
4821 the values has been properly converted to UTF-8</li>
4824 <h3><a name="implemente">How is it implemented ?</a></h3>
4826 <p>Let's describe how all this works within libxml, basically the I18N
4827 (internationalization) support get triggered only during I/O operation, i.e.
4828 when reading a document or saving one. Let's look first at the reading
4831 <li>when a document is processed, we usually don't know the encoding, a
4832 simple heuristic allows to detect UTF-16 and UCS-4 from encodings where
4833 the ASCII range (0-0x7F) maps with ASCII</li>
4834 <li>the xml declaration if available is parsed, including the encoding
4835 declaration. At that point, if the autodetected encoding is different
4836 from the one declared a call to xmlSwitchEncoding() is issued.</li>
4837 <li>If there is no encoding declaration, then the input has to be in either
4838 UTF-8 or UTF-16, if it is not then at some point when processing the
4839 input, the converter/checker of UTF-8 form will raise an encoding error.
4840 You may end-up with a garbled document, or no document at all ! Example:
4841 <pre>~/XML -> ./xmllint err.xml
4842 err.xml:1: error: Input is not proper UTF-8, indicate encoding !
4843 <très>là </très>
4845 err.xml:1: error: Bytes: 0xE8 0x73 0x3E 0x6C
4846 <très>là </très>
4849 <li>xmlSwitchEncoding() does an encoding name lookup, canonicalize it, and
4850 then search the default registered encoding converters for that encoding.
4851 If it's not within the default set and iconv() support has been compiled
4852 it, it will ask iconv for such an encoder. If this fails then the parser
4853 will report an error and stops processing:
4854 <pre>~/XML -> ./xmllint err2.xml
4855 err2.xml:1: error: Unsupported encoding UnsupportedEnc
4856 <?xml version="1.0" encoding="UnsupportedEnc"?>
4859 <li>From that point the encoder processes progressively the input (it is
4860 plugged as a front-end to the I/O module) for that entity. It captures
4861 and converts on-the-fly the document to be parsed to UTF-8. The parser
4862 itself just does UTF-8 checking of this input and process it
4863 transparently. The only difference is that the encoding information has
4864 been added to the parsing context (more precisely to the input
4865 corresponding to this entity).</li>
4866 <li>The result (when using DOM) is an internal form completely in UTF-8
4867 with just an encoding information on the document node.</li>
4870 <p>Ok then what happens when saving the document (assuming you
4871 collected/built an xmlDoc DOM like structure) ? It depends on the function
4872 called, xmlSaveFile() will just try to save in the original encoding, while
4873 xmlSaveFileTo() and xmlSaveFileEnc() can optionally save to a given
4876 <li>if no encoding is given, libxml2 will look for an encoding value
4877 associated to the document and if it exists will try to save to that
4879 <p>otherwise everything is written in the internal form, i.e. UTF-8</p>
4881 <li>so if an encoding was specified, either at the API level or on the
4882 document, libxml2 will again canonicalize the encoding name, lookup for a
4883 converter in the registered set or through iconv. If not found the
4884 function will return an error code</li>
4885 <li>the converter is placed before the I/O buffer layer, as another kind of
4886 buffer, then libxml2 will simply push the UTF-8 serialization to through
4887 that buffer, which will then progressively be converted and pushed onto
4889 <li>It is possible that the converter code fails on some input, for example
4890 trying to push an UTF-8 encoded Chinese character through the UTF-8 to
4891 ISO-8859-1 converter won't work. Since the encoders are progressive they
4892 will just report the error and the number of bytes converted, at that
4893 point libxml2 will decode the offending character, remove it from the
4894 buffer and replace it with the associated charRef encoding &#123; and
4895 resume the conversion. This guarantees that any document will be saved
4896 without losses (except for markup names where this is not legal, this is
4897 a problem in the current version, in practice avoid using non-ascii
4898 characters for tag or attribute names). A special "ascii" encoding name
4899 is used to save documents to a pure ascii form can be used when
4900 portability is really crucial</li>
4903 <p>Here are a few examples based on the same test document and assumin a
4904 terminal using ISO-8859-1 as the text encoding:</p>
4905 <pre>~/XML -> ./xmllint isolat1
4906 <?xml version="1.0" encoding="ISO-8859-1"?>
4907 <très>là</très>
4908 ~/XML -> ./xmllint --encode UTF-8 isolat1
4909 <?xml version="1.0" encoding="UTF-8"?>
4910 <très>là </très>
4913 <p>The same processing is applied (and reuse most of the code) for HTML I18N
4914 processing. Looking up and modifying the content encoding is a bit more
4915 difficult since it is located in a <meta> tag under the <head>,
4916 so a couple of functions htmlGetMetaEncoding() and htmlSetMetaEncoding() have
4917 been provided. The parser also attempts to switch encoding on the fly when
4918 detecting such a tag on input. Except for that the processing is the same
4919 (and again reuses the same code).</p>
4921 <h3><a name="Default">Default supported encodings</a></h3>
4923 <p>libxml2 has a set of default converters for the following encodings
4924 (located in encoding.c):</p>
4926 <li>UTF-8 is supported by default (null handlers)</li>
4927 <li>UTF-16, both little and big endian</li>
4928 <li>ISO-Latin-1 (ISO-8859-1) covering most western languages</li>
4929 <li>ASCII, useful mostly for saving</li>
4930 <li>HTML, a specific handler for the conversion of UTF-8 to ASCII with HTML
4931 predefined entities like &copy; for the Copyright sign.</li>
4934 <p>More over when compiled on an Unix platform with iconv support the full
4935 set of encodings supported by iconv can be instantly be used by libxml. On a
4936 linux machine with glibc-2.1 the list of supported encodings and aliases fill
4937 3 full pages, and include UCS-4, the full set of ISO-Latin encodings, and the
4938 various Japanese ones.</p>
4940 <p>To convert from the UTF-8 values returned from the API to another encoding
4941 then it is possible to use the function provided from <a
4942 href="html/libxml-encoding.html">the encoding module</a> like <a
4943 href="html/libxml-encoding.html#UTF8Toisolat1">UTF8Toisolat1</a>, or use the
4945 href="http://www.opengroup.org/onlinepubs/009695399/functions/iconv.html">iconv()</a>
4948 <h4>Encoding aliases</h4>
4950 <p>From 2.2.3, libxml2 has support to register encoding names aliases. The
4951 goal is to be able to parse document whose encoding is supported but where
4952 the name differs (for example from the default set of names accepted by
4953 iconv). The following functions allow to register and handle new aliases for
4954 existing encodings. Once registered libxml2 will automatically lookup the
4955 aliases when handling a document:</p>
4957 <li>int xmlAddEncodingAlias(const char *name, const char *alias);</li>
4958 <li>int xmlDelEncodingAlias(const char *alias);</li>
4959 <li>const char * xmlGetEncodingAlias(const char *alias);</li>
4960 <li>void xmlCleanupEncodingAliases(void);</li>
4963 <h3><a name="extend">How to extend the existing support</a></h3>
4965 <p>Well adding support for new encoding, or overriding one of the encoders
4966 (assuming it is buggy) should not be hard, just write input and output
4967 conversion routines to/from UTF-8, and register them using
4968 xmlNewCharEncodingHandler(name, xxxToUTF8, UTF8Toxxx), and they will be
4969 called automatically if the parser(s) encounter such an encoding name
4970 (register it uppercase, this will help). The description of the encoders,
4971 their arguments and expected return values are described in the encoding.h
4974 <h2><a name="IO">I/O Interfaces</a></h2>
4976 <p>Table of Content:</p>
4978 <li><a href="#General1">General overview</a></li>
4979 <li><a href="#basic">The basic buffer type</a></li>
4980 <li><a href="#Input">Input I/O handlers</a></li>
4981 <li><a href="#Output">Output I/O handlers</a></li>
4982 <li><a href="#entities">The entities loader</a></li>
4983 <li><a href="#Example2">Example of customized I/O</a></li>
4986 <h3><a name="General1">General overview</a></h3>
4988 <p>The module <code><a
4989 href="http://xmlsoft.org/html/libxml-xmlio.html">xmlIO.h</a></code> provides
4990 the interfaces to the libxml2 I/O system. This consists of 4 main parts:</p>
4992 <li>Entities loader, this is a routine which tries to fetch the entities
4993 (files) based on their PUBLIC and SYSTEM identifiers. The default loader
4994 don't look at the public identifier since libxml2 do not maintain a
4995 catalog. You can redefine you own entity loader by using
4996 <code>xmlGetExternalEntityLoader()</code> and
4997 <code>xmlSetExternalEntityLoader()</code>. <a href="#entities">Check the
4999 <li>Input I/O buffers which are a commodity structure used by the parser(s)
5000 input layer to handle fetching the information to feed the parser. This
5001 provides buffering and is also a placeholder where the encoding
5002 converters to UTF8 are piggy-backed.</li>
5003 <li>Output I/O buffers are similar to the Input ones and fulfill similar
5004 task but when generating a serialization from a tree.</li>
5005 <li>A mechanism to register sets of I/O callbacks and associate them with
5006 specific naming schemes like the protocol part of the URIs.
5007 <p>This affect the default I/O operations and allows to use specific I/O
5008 handlers for certain names.</p>
5012 <p>The general mechanism used when loading http://rpmfind.net/xml.html for
5013 example in the HTML parser is the following:</p>
5015 <li>The default entity loader calls <code>xmlNewInputFromFile()</code> with
5016 the parsing context and the URI string.</li>
5017 <li>the URI string is checked against the existing registered handlers
5018 using their match() callback function, if the HTTP module was compiled
5019 in, it is registered and its match() function will succeeds</li>
5020 <li>the open() function of the handler is called and if successful will
5021 return an I/O Input buffer</li>
5022 <li>the parser will the start reading from this buffer and progressively
5023 fetch information from the resource, calling the read() function of the
5024 handler until the resource is exhausted</li>
5025 <li>if an encoding change is detected it will be installed on the input
5026 buffer, providing buffering and efficient use of the conversion
5028 <li>once the parser has finished, the close() function of the handler is
5029 called once and the Input buffer and associated resources are
5033 <p>The user defined callbacks are checked first to allow overriding of the
5034 default libxml2 I/O routines.</p>
5036 <h3><a name="basic">The basic buffer type</a></h3>
5038 <p>All the buffer manipulation handling is done using the
5039 <code>xmlBuffer</code> type define in <code><a
5040 href="http://xmlsoft.org/html/libxml-tree.html">tree.h</a> </code>which is a
5041 resizable memory buffer. The buffer allocation strategy can be selected to be
5042 either best-fit or use an exponential doubling one (CPU vs. memory use
5043 trade-off). The values are <code>XML_BUFFER_ALLOC_EXACT</code> and
5044 <code>XML_BUFFER_ALLOC_DOUBLEIT</code>, and can be set individually or on a
5045 system wide basis using <code>xmlBufferSetAllocationScheme()</code>. A number
5046 of functions allows to manipulate buffers with names starting with the
5047 <code>xmlBuffer...</code> prefix.</p>
5049 <h3><a name="Input">Input I/O handlers</a></h3>
5051 <p>An Input I/O handler is a simple structure
5052 <code>xmlParserInputBuffer</code> containing a context associated to the
5053 resource (file descriptor, or pointer to a protocol handler), the read() and
5054 close() callbacks to use and an xmlBuffer. And extra xmlBuffer and a charset
5055 encoding handler are also present to support charset conversion when
5058 <h3><a name="Output">Output I/O handlers</a></h3>
5060 <p>An Output handler <code>xmlOutputBuffer</code> is completely similar to an
5061 Input one except the callbacks are write() and close().</p>
5063 <h3><a name="entities">The entities loader</a></h3>
5065 <p>The entity loader resolves requests for new entities and create inputs for
5066 the parser. Creating an input from a filename or an URI string is done
5067 through the xmlNewInputFromFile() routine. The default entity loader do not
5068 handle the PUBLIC identifier associated with an entity (if any). So it just
5069 calls xmlNewInputFromFile() with the SYSTEM identifier (which is mandatory in
5072 <p>If you want to hook up a catalog mechanism then you simply need to
5073 override the default entity loader, here is an example:</p>
5074 <pre>#include <libxml/xmlIO.h>
5076 xmlExternalEntityLoader defaultLoader = NULL;
5079 xmlMyExternalEntityLoader(const char *URL, const char *ID,
5080 xmlParserCtxtPtr ctxt) {
5081 xmlParserInputPtr ret;
5082 const char *fileID = NULL;
5083 /* lookup for the fileID depending on ID */
5085 ret = xmlNewInputFromFile(ctxt, fileID);
5088 if (defaultLoader != NULL)
5089 ret = defaultLoader(URL, ID, ctxt);
5097 * Install our own entity loader
5099 defaultLoader = xmlGetExternalEntityLoader();
5100 xmlSetExternalEntityLoader(xmlMyExternalEntityLoader);
5105 <h3><a name="Example2">Example of customized I/O</a></h3>
5107 <p>This example come from <a href="http://xmlsoft.org/messages/0708.html">a
5108 real use case</a>, xmlDocDump() closes the FILE * passed by the application
5109 and this was a problem. The <a
5110 href="http://xmlsoft.org/messages/0711.html">solution</a> was to redefine a
5111 new output handler with the closing call deactivated:</p>
5113 <li>First define a new I/O output allocator where the output don't close
5115 <pre>xmlOutputBufferPtr
5116 xmlOutputBufferCreateOwn(FILE *file, xmlCharEncodingHandlerPtr encoder) {
5117 xmlOutputBufferPtr ret;
5118
5119 if (xmlOutputCallbackInitialized == 0)
5120 xmlRegisterDefaultOutputCallbacks();
5122 if (file == NULL) return(NULL);
5123 ret = xmlAllocOutputBuffer(encoder);
5124 if (ret != NULL) {
5125 ret->context = file;
5126 ret->writecallback = xmlFileWrite;
5127 ret->closecallback = NULL; /* No close callback */
5128 }
5129 return(ret);
5132 <li>And then use it to save the document:
5134 xmlOutputBufferPtr output;
5141 output = xmlOutputBufferCreateOwn(f, NULL);
5142 res = xmlSaveFileTo(output, doc, NULL);
5147 <h2><a name="Catalog">Catalog support</a></h2>
5149 <p>Table of Content:</p>
5151 <li><a href="General2">General overview</a></li>
5152 <li><a href="#definition">The definition</a></li>
5153 <li><a href="#Simple">Using catalogs</a></li>
5154 <li><a href="#Some">Some examples</a></li>
5155 <li><a href="#reference">How to tune catalog usage</a></li>
5156 <li><a href="#validate">How to debug catalog processing</a></li>
5157 <li><a href="#Declaring">How to create and maintain catalogs</a></li>
5158 <li><a href="#implemento">The implementor corner quick review of the
5160 <li><a href="#Other">Other resources</a></li>
5163 <h3><a name="General2">General overview</a></h3>
5165 <p>What is a catalog? Basically it's a lookup mechanism used when an entity
5166 (a file or a remote resource) references another entity. The catalog lookup
5167 is inserted between the moment the reference is recognized by the software
5168 (XML parser, stylesheet processing, or even images referenced for inclusion
5169 in a rendering) and the time where loading that resource is actually
5172 <p>It is basically used for 3 things:</p>
5174 <li>mapping from "logical" names, the public identifiers and a more
5175 concrete name usable for download (and URI). For example it can associate
5177 <p>"-//OASIS//DTD DocBook XML V4.1.2//EN"</p>
5178 <p>of the DocBook 4.1.2 XML DTD with the actual URL where it can be
5180 <p>http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd</p>
5182 <li>remapping from a given URL to another one, like an HTTP indirection
5184 <p>"http://www.oasis-open.org/committes/tr.xsl"</p>
5185 <p>should really be looked at</p>
5186 <p>"http://www.oasis-open.org/committes/entity/stylesheets/base/tr.xsl"</p>
5188 <li>providing a local cache mechanism allowing to load the entities
5189 associated to public identifiers or remote resources, this is a really
5190 important feature for any significant deployment of XML or SGML since it
5191 allows to avoid the aleas and delays associated to fetching remote
5195 <h3><a name="definition">The definitions</a></h3>
5197 <p>Libxml, as of 2.4.3 implements 2 kind of catalogs:</p>
5199 <li>the older SGML catalogs, the official spec is SGML Open Technical
5200 Resolution TR9401:1997, but is better understood by reading <a
5201 href="http://www.jclark.com/sp/catalog.htm">the SP Catalog page</a> from
5202 James Clark. This is relatively old and not the preferred mode of
5203 operation of libxml.</li>
5204 <li><a href="http://www.oasis-open.org/committees/entity/spec.html">XML
5205 Catalogs</a> is far more flexible, more recent, uses an XML syntax and
5206 should scale quite better. This is the default option of libxml.</li>
5211 <h3><a name="Simple">Using catalog</a></h3>
5213 <p>In a normal environment libxml2 will by default check the presence of a
5214 catalog in /etc/xml/catalog, and assuming it has been correctly populated,
5215 the processing is completely transparent to the document user. To take a
5216 concrete example, suppose you are authoring a DocBook document, this one
5217 starts with the following DOCTYPE definition:</p>
5218 <pre><?xml version='1.0'?>
5219 <!DOCTYPE book PUBLIC "-//Norman Walsh//DTD DocBk XML V3.1.4//EN"
5220 "http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd"></pre>
5222 <p>When validating the document with libxml, the catalog will be
5223 automatically consulted to lookup the public identifier "-//Norman Walsh//DTD
5224 DocBk XML V3.1.4//EN" and the system identifier
5225 "http://nwalsh.com/docbook/xml/3.1.4/db3xml.dtd", and if these entities have
5226 been installed on your system and the catalogs actually point to them, libxml
5227 will fetch them from the local disk.</p>
5229 <p style="font-size: 10pt"><strong>Note</strong>: Really don't use this
5230 DOCTYPE example it's a really old version, but is fine as an example.</p>
5232 <p>Libxml2 will check the catalog each time that it is requested to load an
5233 entity, this includes DTD, external parsed entities, stylesheets, etc ... If
5234 your system is correctly configured all the authoring phase and processing
5235 should use only local files, even if your document stays portable because it
5236 uses the canonical public and system ID, referencing the remote document.</p>
5238 <h3><a name="Some">Some examples:</a></h3>
5240 <p>Here is a couple of fragments from XML Catalogs used in libxml2 early
5241 regression tests in <code>test/catalogs</code> :</p>
5242 <pre><?xml version="1.0"?>
5243 <!DOCTYPE catalog PUBLIC
5244 "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
5245 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
5246 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
5247 <public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN"
5248 uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/>
5251 <p>This is the beginning of a catalog for DocBook 4.1.2, XML Catalogs are
5252 written in XML, there is a specific namespace for catalog elements
5253 "urn:oasis:names:tc:entity:xmlns:xml:catalog". The first entry in this
5254 catalog is a <code>public</code> mapping it allows to associate a Public
5255 Identifier with an URI.</p>
5257 <rewriteSystem systemIdStartString="http://www.oasis-open.org/docbook/"
5258 rewritePrefix="file:///usr/share/xml/docbook/"/>
5261 <p>A <code>rewriteSystem</code> is a very powerful instruction, it says that
5262 any URI starting with a given prefix should be looked at another URI
5263 constructed by replacing the prefix with an new one. In effect this acts like
5264 a cache system for a full area of the Web. In practice it is extremely useful
5265 with a file prefix if you have installed a copy of those resources on your
5268 <delegatePublic publicIdStartString="-//OASIS//DTD XML Catalog //"
5269 catalog="file:///usr/share/xml/docbook.xml"/>
5270 <delegatePublic publicIdStartString="-//OASIS//ENTITIES DocBook XML"
5271 catalog="file:///usr/share/xml/docbook.xml"/>
5272 <delegatePublic publicIdStartString="-//OASIS//DTD DocBook XML"
5273 catalog="file:///usr/share/xml/docbook.xml"/>
5274 <delegateSystem systemIdStartString="http://www.oasis-open.org/docbook/"
5275 catalog="file:///usr/share/xml/docbook.xml"/>
5276 <delegateURI uriStartString="http://www.oasis-open.org/docbook/"
5277 catalog="file:///usr/share/xml/docbook.xml"/>
5280 <p>Delegation is the core features which allows to build a tree of catalogs,
5281 easier to maintain than a single catalog, based on Public Identifier, System
5282 Identifier or URI prefixes it instructs the catalog software to look up
5283 entries in another resource. This feature allow to build hierarchies of
5284 catalogs, the set of entries presented should be sufficient to redirect the
5285 resolution of all DocBook references to the specific catalog in
5286 <code>/usr/share/xml/docbook.xml</code> this one in turn could delegate all
5287 references for DocBook 4.2.1 to a specific catalog installed at the same time
5288 as the DocBook resources on the local machine.</p>
5290 <h3><a name="reference">How to tune catalog usage:</a></h3>
5292 <p>The user can change the default catalog behaviour by redirecting queries
5293 to its own set of catalogs, this can be done by setting the
5294 <code>XML_CATALOG_FILES</code> environment variable to a list of catalogs, an
5295 empty one should deactivate loading the default <code>/etc/xml/catalog</code>
5298 <h3><a name="validate">How to debug catalog processing:</a></h3>
5300 <p>Setting up the <code>XML_DEBUG_CATALOG</code> environment variable will
5301 make libxml2 output debugging information for each catalog operations, for
5303 <pre>orchis:~/XML -> xmllint --memory --noout test/ent2
5304 warning: failed to load external entity "title.xml"
5305 orchis:~/XML -> export XML_DEBUG_CATALOG=
5306 orchis:~/XML -> xmllint --memory --noout test/ent2
5307 Failed to parse catalog /etc/xml/catalog
5308 Failed to parse catalog /etc/xml/catalog
5309 warning: failed to load external entity "title.xml"
5311 orchis:~/XML -> </pre>
5313 <p>The test/ent2 references an entity, running the parser from memory makes
5314 the base URI unavailable and the the "title.xml" entity cannot be loaded.
5315 Setting up the debug environment variable allows to detect that an attempt is
5316 made to load the <code>/etc/xml/catalog</code> but since it's not present the
5317 resolution fails.</p>
5319 <p>But the most advanced way to debug XML catalog processing is to use the
5320 <strong>xmlcatalog</strong> command shipped with libxml2, it allows to load
5321 catalogs and make resolution queries to see what is going on. This is also
5322 used for the regression tests:</p>
5323 <pre>orchis:~/XML -> ./xmlcatalog test/catalogs/docbook.xml \
5324 "-//OASIS//DTD DocBook XML V4.1.2//EN"
5325 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd
5326 orchis:~/XML -> </pre>
5328 <p>For debugging what is going on, adding one -v flags increase the verbosity
5329 level to indicate the processing done (adding a second flag also indicate
5330 what elements are recognized at parsing):</p>
5331 <pre>orchis:~/XML -> ./xmlcatalog -v test/catalogs/docbook.xml \
5332 "-//OASIS//DTD DocBook XML V4.1.2//EN"
5333 Parsing catalog test/catalogs/docbook.xml's content
5334 Found public match -//OASIS//DTD DocBook XML V4.1.2//EN
5335 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd
5337 orchis:~/XML -> </pre>
5339 <p>A shell interface is also available to debug and process multiple queries
5340 (and for regression tests):</p>
5341 <pre>orchis:~/XML -> ./xmlcatalog -shell test/catalogs/docbook.xml \
5342 "-//OASIS//DTD DocBook XML V4.1.2//EN"
5345 public PublicID: make a PUBLIC identifier lookup
5346 system SystemID: make a SYSTEM identifier lookup
5347 resolve PublicID SystemID: do a full resolver lookup
5348 add 'type' 'orig' 'replace' : add an entry
5349 del 'values' : remove values
5350 dump: print the current catalog state
5351 debug: increase the verbosity level
5352 quiet: decrease the verbosity level
5353 exit: quit the shell
5354 > public "-//OASIS//DTD DocBook XML V4.1.2//EN"
5355 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd
5357 orchis:~/XML -> </pre>
5359 <p>This should be sufficient for most debugging purpose, this was actually
5360 used heavily to debug the XML Catalog implementation itself.</p>
5362 <h3><a name="Declaring">How to create and maintain</a> catalogs:</h3>
5364 <p>Basically XML Catalogs are XML files, you can either use XML tools to
5365 manage them or use <strong>xmlcatalog</strong> for this. The basic step is
5366 to create a catalog the -create option provide this facility:</p>
5367 <pre>orchis:~/XML -> ./xmlcatalog --create tst.xml
5368 <?xml version="1.0"?>
5369 <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
5370 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
5371 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/>
5372 orchis:~/XML -> </pre>
5374 <p>By default xmlcatalog does not overwrite the original catalog and save the
5375 result on the standard output, this can be overridden using the -noout
5376 option. The <code>-add</code> command allows to add entries in the
5378 <pre>orchis:~/XML -> ./xmlcatalog --noout --create --add "public" \
5379 "-//OASIS//DTD DocBook XML V4.1.2//EN" \
5380 http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd tst.xml
5381 orchis:~/XML -> cat tst.xml
5382 <?xml version="1.0"?>
5383 <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" \
5384 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
5385 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
5386 <public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN"
5387 uri="http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"/>
5389 orchis:~/XML -> </pre>
5391 <p>The <code>-add</code> option will always take 3 parameters even if some of
5392 the XML Catalog constructs (like nextCatalog) will have only a single
5393 argument, just pass a third empty string, it will be ignored.</p>
5395 <p>Similarly the <code>-del</code> option remove matching entries from the
5397 <pre>orchis:~/XML -> ./xmlcatalog --del \
5398 "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" tst.xml
5399 <?xml version="1.0"?>
5400 <!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN"
5401 "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
5402 <catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog"/>
5403 orchis:~/XML -> </pre>
5405 <p>The catalog is now empty. Note that the matching of <code>-del</code> is
5406 exact and would have worked in a similar fashion with the Public ID
5409 <p>This is rudimentary but should be sufficient to manage a not too complex
5410 catalog tree of resources.</p>
5412 <h3><a name="implemento">The implementor corner quick review of the
5415 <p>First, and like for every other module of libxml, there is an
5416 automatically generated <a href="html/libxml-catalog.html">API page for
5417 catalog support</a>.</p>
5419 <p>The header for the catalog interfaces should be included as:</p>
5420 <pre>#include <libxml/catalog.h></pre>
5422 <p>The API is voluntarily kept very simple. First it is not obvious that
5423 applications really need access to it since it is the default behaviour of
5424 libxml2 (Note: it is possible to completely override libxml2 default catalog
5425 by using <a href="html/libxml-parser.html">xmlSetExternalEntityLoader</a> to
5426 plug an application specific resolver).</p>
5428 <p>Basically libxml2 support 2 catalog lists:</p>
5430 <li>the default one, global shared by all the application</li>
5431 <li>a per-document catalog, this one is built if the document uses the
5432 <code>oasis-xml-catalog</code> PIs to specify its own catalog list, it is
5433 associated to the parser context and destroyed when the parsing context
5437 <p>the document one will be used first if it exists.</p>
5439 <h4>Initialization routines:</h4>
5441 <p>xmlInitializeCatalog(), xmlLoadCatalog() and xmlLoadCatalogs() should be
5442 used at startup to initialize the catalog, if the catalog should be
5443 initialized with specific values xmlLoadCatalog() or xmlLoadCatalogs()
5444 should be called before xmlInitializeCatalog() which would otherwise do a
5445 default initialization first.</p>
5447 <p>The xmlCatalogAddLocal() call is used by the parser to grow the document
5448 own catalog list if needed.</p>
5450 <h4>Preferences setup:</h4>
5452 <p>The XML Catalog spec requires the possibility to select default
5453 preferences between public and system delegation,
5454 xmlCatalogSetDefaultPrefer() allows this, xmlCatalogSetDefaults() and
5455 xmlCatalogGetDefaults() allow to control if XML Catalogs resolution should
5456 be forbidden, allowed for global catalog, for document catalog or both, the
5457 default is to allow both.</p>
5459 <p>And of course xmlCatalogSetDebug() allows to generate debug messages
5460 (through the xmlGenericError() mechanism).</p>
5462 <h4>Querying routines:</h4>
5464 <p>xmlCatalogResolve(), xmlCatalogResolveSystem(), xmlCatalogResolvePublic()
5465 and xmlCatalogResolveURI() are relatively explicit if you read the XML
5466 Catalog specification they correspond to section 7 algorithms, they should
5467 also work if you have loaded an SGML catalog with a simplified semantic.</p>
5469 <p>xmlCatalogLocalResolve() and xmlCatalogLocalResolveURI() are the same but
5470 operate on the document catalog list</p>
5472 <h4>Cleanup and Miscellaneous:</h4>
5474 <p>xmlCatalogCleanup() free-up the global catalog, xmlCatalogFreeLocal() is
5475 the per-document equivalent.</p>
5477 <p>xmlCatalogAdd() and xmlCatalogRemove() are used to dynamically modify the
5478 first catalog in the global list, and xmlCatalogDump() allows to dump a
5479 catalog state, those routines are primarily designed for xmlcatalog, I'm not
5480 sure that exposing more complex interfaces (like navigation ones) would be
5483 <p>The xmlParseCatalogFile() is a function used to load XML Catalog files,
5484 it's similar as xmlParseFile() except it bypass all catalog lookups, it's
5485 provided because this functionality may be useful for client tools.</p>
5487 <h4>threaded environments:</h4>
5489 <p>Since the catalog tree is built progressively, some care has been taken to
5490 try to avoid troubles in multithreaded environments. The code is now thread
5491 safe assuming that the libxml2 library has been compiled with threads
5496 <h3><a name="Other">Other resources</a></h3>
5498 <p>The XML Catalog specification is relatively recent so there isn't much
5499 literature to point at:</p>
5501 <li>You can find a good rant from Norm Walsh about <a
5502 href="http://www.arbortext.com/Think_Tank/XML_Resources/Issue_Three/issue_three.html">the
5503 need for catalogs</a>, it provides a lot of context information even if
5504 I don't agree with everything presented. Norm also wrote a more recent
5506 href="http://wwws.sun.com/software/xml/developers/resolver/article/">XML
5507 entities and URI resolvers</a> describing them.</li>
5508 <li>An <a href="http://home.ccil.org/~cowan/XML/XCatalog.html">old XML
5509 catalog proposal</a> from John Cowan</li>
5510 <li>The <a href="http://www.rddl.org/">Resource Directory Description
5511 Language</a> (RDDL) another catalog system but more oriented toward
5512 providing metadata for XML namespaces.</li>
5513 <li>the page from the OASIS Technical <a
5514 href="http://www.oasis-open.org/committees/entity/">Committee on Entity
5515 Resolution</a> who maintains XML Catalog, you will find pointers to the
5516 specification update, some background and pointers to others tools
5517 providing XML Catalog support</li>
5518 <li>There is a <a href="buildDocBookCatalog">shell script</a> to generate
5519 XML Catalogs for DocBook 4.1.2 . If it can write to the /etc/xml/
5520 directory, it will set-up /etc/xml/catalog and /etc/xml/docbook based on
5521 the resources found on the system. Otherwise it will just create
5522 ~/xmlcatalog and ~/dbkxmlcatalog and doing:
5523 <p><code>export XML_CATALOG_FILES=$HOME/xmlcatalog</code></p>
5524 <p>should allow to process DocBook documentations without requiring
5525 network accesses for the DTD or stylesheets</p>
5527 <li>I have uploaded <a href="ftp://xmlsoft.org/libxml2/test/dbk412catalog.tar.gz">a
5528 small tarball</a> containing XML Catalogs for DocBook 4.1.2 which seems
5529 to work fine for me too</li>
5530 <li>The <a href="http://www.xmlsoft.org/xmlcatalog_man.html">xmlcatalog
5531 manual page</a></li>
5534 <p>If you have suggestions for corrections or additions, simply contact
5537 <h2><a name="library">The parser interfaces</a></h2>
5539 <p>This section is directly intended to help programmers getting bootstrapped
5540 using the XML tollkit from the C language. It is not intended to be
5541 extensive. I hope the automatically generated documents will provide the
5542 completeness required, but as a separate set of documents. The interfaces of
5543 the XML parser are by principle low level, Those interested in a higher level
5544 API should <a href="#DOM">look at DOM</a>.</p>
5546 <p>The <a href="html/libxml-parser.html">parser interfaces for XML</a> are
5547 separated from the <a href="html/libxml-htmlparser.html">HTML parser
5548 interfaces</a>. Let's have a look at how the XML parser can be called:</p>
5550 <h3><a name="Invoking">Invoking the parser : the pull method</a></h3>
5552 <p>Usually, the first thing to do is to read an XML input. The parser accepts
5553 documents either from in-memory strings or from files. The functions are
5554 defined in "parser.h":</p>
5556 <dt><code>xmlDocPtr xmlParseMemory(char *buffer, int size);</code></dt>
5557 <dd><p>Parse a null-terminated string containing the document.</p>
5561 <dt><code>xmlDocPtr xmlParseFile(const char *filename);</code></dt>
5562 <dd><p>Parse an XML document contained in a (possibly compressed)
5567 <p>The parser returns a pointer to the document structure (or NULL in case of
5570 <h3 id="Invoking1">Invoking the parser: the push method</h3>
5572 <p>In order for the application to keep the control when the document is
5573 being fetched (which is common for GUI based programs) libxml2 provides a
5574 push interface, too, as of version 1.8.3. Here are the interface
5576 <pre>xmlParserCtxtPtr xmlCreatePushParserCtxt(xmlSAXHandlerPtr sax,
5580 const char *filename);
5581 int xmlParseChunk (xmlParserCtxtPtr ctxt,
5584 int terminate);</pre>
5586 <p>and here is a simple example showing how to use the interface:</p>
5589 f = fopen(filename, "r");
5591 int res, size = 1024;
5593 xmlParserCtxtPtr ctxt;
5595 res = fread(chars, 1, 4, f);
5597 ctxt = xmlCreatePushParserCtxt(NULL, NULL,
5598 chars, res, filename);
5599 while ((res = fread(chars, 1, size, f)) > 0) {
5600 xmlParseChunk(ctxt, chars, res, 0);
5602 xmlParseChunk(ctxt, chars, 0, 1);
5603 doc = ctxt->myDoc;
5604 xmlFreeParserCtxt(ctxt);
5608 <p>The HTML parser embedded into libxml2 also has a push interface; the
5609 functions are just prefixed by "html" rather than "xml".</p>
5611 <h3 id="Invoking2">Invoking the parser: the SAX interface</h3>
5613 <p>The tree-building interface makes the parser memory-hungry, first loading
5614 the document in memory and then building the tree itself. Reading a document
5615 without building the tree is possible using the SAX interfaces (see SAX.h and
5616 <a href="http://www.daa.com.au/~james/gnome/xml-sax/xml-sax.html">James
5617 Henstridge's documentation</a>). Note also that the push interface can be
5618 limited to SAX: just use the two first arguments of
5619 <code>xmlCreatePushParserCtxt()</code>.</p>
5621 <h3><a name="Building">Building a tree from scratch</a></h3>
5623 <p>The other way to get an XML tree in memory is by building it. Basically
5624 there is a set of functions dedicated to building new elements. (These are
5625 also described in <libxml/tree.h>.) For example, here is a piece of
5626 code that produces the XML document used in the previous examples:</p>
5627 <pre> #include <libxml/tree.h>
5629 xmlNodePtr tree, subtree;
5631 doc = xmlNewDoc("1.0");
5632 doc->children = xmlNewDocNode(doc, NULL, "EXAMPLE", NULL);
5633 xmlSetProp(doc->children, "prop1", "gnome is great");
5634 xmlSetProp(doc->children, "prop2", "& linux too");
5635 tree = xmlNewChild(doc->children, NULL, "head", NULL);
5636 subtree = xmlNewChild(tree, NULL, "title", "Welcome to Gnome");
5637 tree = xmlNewChild(doc->children, NULL, "chapter", NULL);
5638 subtree = xmlNewChild(tree, NULL, "title", "The Linux adventure");
5639 subtree = xmlNewChild(tree, NULL, "p", "bla bla bla ...");
5640 subtree = xmlNewChild(tree, NULL, "image", NULL);
5641 xmlSetProp(subtree, "href", "linus.gif");</pre>
5643 <p>Not really rocket science ...</p>
5645 <h3><a name="Traversing">Traversing the tree</a></h3>
5647 <p>Basically by <a href="html/libxml-tree.html">including "tree.h"</a> your
5648 code has access to the internal structure of all the elements of the tree.
5649 The names should be somewhat simple like <strong>parent</strong>,
5650 <strong>children</strong>, <strong>next</strong>, <strong>prev</strong>,
5651 <strong>properties</strong>, etc... For example, still with the previous
5653 <pre><code>doc->children->children->children</code></pre>
5655 <p>points to the title element,</p>
5656 <pre>doc->children->children->next->children->children</pre>
5658 <p>points to the text node containing the chapter title "The Linux
5661 <p><strong>NOTE</strong>: XML allows <em>PI</em>s and <em>comments</em> to be
5662 present before the document root, so <code>doc->children</code> may point
5663 to an element which is not the document Root Element; a function
5664 <code>xmlDocGetRootElement()</code> was added for this purpose.</p>
5666 <h3><a name="Modifying">Modifying the tree</a></h3>
5668 <p>Functions are provided for reading and writing the document content. Here
5669 is an excerpt from the <a href="html/libxml-tree.html">tree API</a>:</p>
5671 <dt><code>xmlAttrPtr xmlSetProp(xmlNodePtr node, const xmlChar *name, const
5672 xmlChar *value);</code></dt>
5673 <dd><p>This sets (or changes) an attribute carried by an ELEMENT node.
5674 The value can be NULL.</p>
5678 <dt><code>const xmlChar *xmlGetProp(xmlNodePtr node, const xmlChar
5680 <dd><p>This function returns a pointer to new copy of the property
5681 content. Note that the user must deallocate the result.</p>
5685 <p>Two functions are provided for reading and writing the text associated
5688 <dt><code>xmlNodePtr xmlStringGetNodeList(xmlDocPtr doc, const xmlChar
5689 *value);</code></dt>
5690 <dd><p>This function takes an "external" string and converts it to one
5691 text node or possibly to a list of entity and text nodes. All
5692 non-predefined entity references like &Gnome; will be stored
5693 internally as entity nodes, hence the result of the function may not be
5698 <dt><code>xmlChar *xmlNodeListGetString(xmlDocPtr doc, xmlNodePtr list, int
5699 inLine);</code></dt>
5700 <dd><p>This function is the inverse of
5701 <code>xmlStringGetNodeList()</code>. It generates a new string
5702 containing the content of the text and entity nodes. Note the extra
5703 argument inLine. If this argument is set to 1, the function will expand
5704 entity references. For example, instead of returning the &Gnome;
5705 XML encoding in the string, it will substitute it with its value (say,
5706 "GNU Network Object Model Environment").</p>
5710 <h3><a name="Saving">Saving a tree</a></h3>
5712 <p>Basically 3 options are possible:</p>
5714 <dt><code>void xmlDocDumpMemory(xmlDocPtr cur, xmlChar**mem, int
5716 <dd><p>Returns a buffer into which the document has been saved.</p>
5720 <dt><code>extern void xmlDocDump(FILE *f, xmlDocPtr doc);</code></dt>
5721 <dd><p>Dumps a document to an open file descriptor.</p>
5725 <dt><code>int xmlSaveFile(const char *filename, xmlDocPtr cur);</code></dt>
5726 <dd><p>Saves the document to a file. In this case, the compression
5727 interface is triggered if it has been turned on.</p>
5731 <h3><a name="Compressio">Compression</a></h3>
5733 <p>The library transparently handles compression when doing file-based
5734 accesses. The level of compression on saves can be turned on either globally
5735 or individually for one file:</p>
5737 <dt><code>int xmlGetDocCompressMode (xmlDocPtr doc);</code></dt>
5738 <dd><p>Gets the document compression ratio (0-9).</p>
5742 <dt><code>void xmlSetDocCompressMode (xmlDocPtr doc, int mode);</code></dt>
5743 <dd><p>Sets the document compression ratio.</p>
5747 <dt><code>int xmlGetCompressMode(void);</code></dt>
5748 <dd><p>Gets the default compression ratio.</p>
5752 <dt><code>void xmlSetCompressMode(int mode);</code></dt>
5753 <dd><p>Sets the default compression ratio.</p>
5757 <h2><a name="Entities">Entities or no entities</a></h2>
5759 <p>Entities in principle are similar to simple C macros. An entity defines an
5760 abbreviation for a given string that you can reuse many times throughout the
5761 content of your document. Entities are especially useful when a given string
5762 may occur frequently within a document, or to confine the change needed to a
5763 document to a restricted area in the internal subset of the document (at the
5764 beginning). Example:</p>
5765 <pre>1 <?xml version="1.0"?>
5766 2 <!DOCTYPE EXAMPLE SYSTEM "example.dtd" [
5767 3 <!ENTITY xml "Extensible Markup Language">
5771 7 </EXAMPLE></pre>
5773 <p>Line 3 declares the xml entity. Line 6 uses the xml entity, by prefixing
5774 its name with '&' and following it by ';' without any spaces added. There
5775 are 5 predefined entities in libxml2 allowing you to escape characters with
5776 predefined meaning in some parts of the xml document content:
5777 <strong>&lt;</strong> for the character '<', <strong>&gt;</strong>
5778 for the character '>', <strong>&apos;</strong> for the character ''',
5779 <strong>&quot;</strong> for the character '"', and
5780 <strong>&amp;</strong> for the character '&'.</p>
5782 <p>One of the problems related to entities is that you may want the parser to
5783 substitute an entity's content so that you can see the replacement text in
5784 your application. Or you may prefer to keep entity references as such in the
5785 content to be able to save the document back without losing this usually
5786 precious information (if the user went through the pain of explicitly
5787 defining entities, he may have a a rather negative attitude if you blindly
5788 substitute them as saving time). The <a
5789 href="html/libxml-parser.html#xmlSubstituteEntitiesDefault">xmlSubstituteEntitiesDefault()</a>
5790 function allows you to check and change the behaviour, which is to not
5791 substitute entities by default.</p>
5793 <p>Here is the DOM tree built by libxml2 for the previous document in the
5795 <pre>/gnome/src/gnome-xml -> ./xmllint --debug test/ent1
5802 INTERNAL_GENERAL_ENTITY xml
5803 content=Extensible Markup Language
5807 <p>And here is the result when substituting entities:</p>
5808 <pre>/gnome/src/gnome-xml -> ./tester --debug --noent test/ent1
5813 content= Extensible Markup Language</pre>
5815 <p>So, entities or no entities? Basically, it depends on your use case. I
5816 suggest that you keep the non-substituting default behaviour and avoid using
5817 entities in your XML document or data if you are not willing to handle the
5818 entity references elements in the DOM tree.</p>
5820 <p>Note that at save time libxml2 enforces the conversion of the predefined
5821 entities where necessary to prevent well-formedness problems, and will also
5822 transparently replace those with chars (i.e. it will not generate entity
5823 reference elements in the DOM tree or call the reference() SAX callback when
5824 finding them in the input).</p>
5826 <p><span style="background-color: #FF0000">WARNING</span>: handling entities
5827 on top of the libxml2 SAX interface is difficult!!! If you plan to use
5828 non-predefined entities in your documents, then the learning curve to handle
5829 then using the SAX API may be long. If you plan to use complex documents, I
5830 strongly suggest you consider using the DOM interface instead and let libxml
5831 deal with the complexity rather than trying to do it yourself.</p>
5833 <h2><a name="Namespaces">Namespaces</a></h2>
5835 <p>The libxml2 library implements <a
5836 href="http://www.w3.org/TR/REC-xml-names/">XML namespaces</a> support by
5837 recognizing namespace constructs in the input, and does namespace lookup
5838 automatically when building the DOM tree. A namespace declaration is
5839 associated with an in-memory structure and all elements or attributes within
5840 that namespace point to it. Hence testing the namespace is a simple and fast
5841 equality operation at the user level.</p>
5843 <p>I suggest that people using libxml2 use a namespace, and declare it in the
5844 root element of their document as the default namespace. Then they don't need
5845 to use the prefix in the content but we will have a basis for future semantic
5846 refinement and merging of data from different sources. This doesn't increase
5847 the size of the XML output significantly, but significantly increases its
5848 value in the long-term. Example:</p>
5849 <pre><mydoc xmlns="http://mydoc.example.org/schemas/">
5850 <elem1>...</elem1>
5851 <elem2>...</elem2>
5852 </mydoc></pre>
5854 <p>The namespace value has to be an absolute URL, but the URL doesn't have to
5855 point to any existing resource on the Web. It will bind all the element and
5856 attributes with that URL. I suggest to use an URL within a domain you
5857 control, and that the URL should contain some kind of version information if
5858 possible. For example, <code>"http://www.gnome.org/gnumeric/1.0/"</code> is a
5859 good namespace scheme.</p>
5861 <p>Then when you load a file, make sure that a namespace carrying the
5862 version-independent prefix is installed on the root element of your document,
5863 and if the version information don't match something you know, warn the user
5864 and be liberal in what you accept as the input. Also do *not* try to base
5865 namespace checking on the prefix value. <foo:text> may be exactly the
5866 same as <bar:text> in another document. What really matters is the URI
5867 associated with the element or the attribute, not the prefix string (which is
5868 just a shortcut for the full URI). In libxml, element and attributes have an
5869 <code>ns</code> field pointing to an xmlNs structure detailing the namespace
5870 prefix and its URI.</p>
5872 <p>@@Interfaces@@</p>
5873 <pre>xmlNodePtr node;
5874 if(!strncmp(node->name,"mytag",5)
5875 && node->ns
5876 && !strcmp(node->ns->href,"http://www.mysite.com/myns/1.0")) {
5880 <p>Usually people object to using namespaces together with validity checking.
5881 I will try to make sure that using namespaces won't break validity checking,
5882 so even if you plan to use or currently are using validation I strongly
5883 suggest adding namespaces to your document. A default namespace scheme
5884 <code>xmlns="http://...."</code> should not break validity even on less
5885 flexible parsers. Using namespaces to mix and differentiate content coming
5886 from multiple DTDs will certainly break current validation schemes. To check
5887 such documents one needs to use schema-validation, which is supported in
5888 libxml2 as well. See <a href="http://www.relaxng.org/">relagx-ng</a> and <a
5889 href="http://www.w3c.org/XML/Schema">w3c-schema</a>.</p>
5891 <h2><a name="Upgrading">Upgrading 1.x code</a></h2>
5893 <p>Incompatible changes:</p>
5895 <p>Version 2 of libxml2 is the first version introducing serious backward
5896 incompatible changes. The main goals were:</p>
5898 <li>a general cleanup. A number of mistakes inherited from the very early
5899 versions couldn't be changed due to compatibility constraints. Example
5900 the "childs" element in the nodes.</li>
5901 <li>Uniformization of the various nodes, at least for their header and link
5902 parts (doc, parent, children, prev, next), the goal is a simpler
5903 programming model and simplifying the task of the DOM implementors.</li>
5904 <li>better conformances to the XML specification, for example version 1.x
5905 had an heuristic to try to detect ignorable white spaces. As a result the
5906 SAX event generated were ignorableWhitespace() while the spec requires
5907 character() in that case. This also mean that a number of DOM node
5908 containing blank text may populate the DOM tree which were not present
5912 <h3>How to fix libxml-1.x code:</h3>
5914 <p>So client code of libxml designed to run with version 1.x may have to be
5915 changed to compile against version 2.x of libxml. Here is a list of changes
5916 that I have collected, they may not be sufficient, so in case you find other
5917 change which are required, <a href="mailto:Daniel.Veillard@w3.org">drop me a
5920 <li>The package name have changed from libxml to libxml2, the library name
5921 is now -lxml2 . There is a new xml2-config script which should be used to
5922 select the right parameters libxml2</li>
5923 <li>Node <strong>childs</strong> field has been renamed
5924 <strong>children</strong> so s/childs/children/g should be applied
5925 (probability of having "childs" anywhere else is close to 0+</li>
5926 <li>The document don't have anymore a <strong>root</strong> element it has
5927 been replaced by <strong>children</strong> and usually you will get a
5928 list of element here. For example a Dtd element for the internal subset
5929 and it's declaration may be found in that list, as well as processing
5930 instructions or comments found before or after the document root element.
5931 Use <strong>xmlDocGetRootElement(doc)</strong> to get the root element of
5932 a document. Alternatively if you are sure to not reference DTDs nor have
5933 PIs or comments before or after the root element
5934 s/->root/->children/g will probably do it.</li>
5935 <li>The white space issue, this one is more complex, unless special case of
5936 validating parsing, the line breaks and spaces usually used for indenting
5937 and formatting the document content becomes significant. So they are
5938 reported by SAX and if your using the DOM tree, corresponding nodes are
5939 generated. Too approach can be taken:
5941 <li>lazy one, use the compatibility call
5942 <strong>xmlKeepBlanksDefault(0)</strong> but be aware that you are
5943 relying on a special (and possibly broken) set of heuristics of
5944 libxml to detect ignorable blanks. Don't complain if it breaks or
5945 make your application not 100% clean w.r.t. to it's input.</li>
5946 <li>the Right Way: change you code to accept possibly insignificant
5947 blanks characters, or have your tree populated with weird blank text
5948 nodes. You can spot them using the commodity function
5949 <strong>xmlIsBlankNode(node)</strong> returning 1 for such blank
5952 <p>Note also that with the new default the output functions don't add any
5953 extra indentation when saving a tree in order to be able to round trip
5954 (read and save) without inflating the document with extra formatting
5957 <li>The include path has changed to $prefix/libxml/ and the includes
5958 themselves uses this new prefix in includes instructions... If you are
5959 using (as expected) the
5960 <pre>xml2-config --cflags</pre>
5961 <p>output to generate you compile commands this will probably work out of
5964 <li>xmlDetectCharEncoding takes an extra argument indicating the length in
5965 byte of the head of the document available for character detection.</li>
5968 <h3>Ensuring both libxml-1.x and libxml-2.x compatibility</h3>
5970 <p>Two new version of libxml (1.8.11) and libxml2 (2.3.4) have been released
5971 to allow smooth upgrade of existing libxml v1code while retaining
5972 compatibility. They offers the following:</p>
5974 <li>similar include naming, one should use
5975 <strong>#include<libxml/...></strong> in both cases.</li>
5976 <li>similar identifiers defined via macros for the child and root fields:
5977 respectively <strong>xmlChildrenNode</strong> and
5978 <strong>xmlRootNode</strong></li>
5979 <li>a new macro <strong>LIBXML_TEST_VERSION</strong> which should be
5980 inserted once in the client code</li>
5983 <p>So the roadmap to upgrade your existing libxml applications is the
5986 <li>install the libxml-1.8.8 (and libxml-devel-1.8.8) packages</li>
5987 <li>find all occurrences where the xmlDoc <strong>root</strong> field is
5988 used and change it to <strong>xmlRootNode</strong></li>
5989 <li>similarly find all occurrences where the xmlNode
5990 <strong>childs</strong> field is used and change it to
5991 <strong>xmlChildrenNode</strong></li>
5992 <li>add a <strong>LIBXML_TEST_VERSION</strong> macro somewhere in your
5993 <strong>main()</strong> or in the library init entry point</li>
5994 <li>Recompile, check compatibility, it should still work</li>
5995 <li>Change your configure script to look first for xml2-config and fall
5996 back using xml-config . Use the --cflags and --libs output of the command
5997 as the Include and Linking parameters needed to use libxml.</li>
5998 <li>install libxml2-2.3.x and libxml2-devel-2.3.x (libxml-1.8.y and
5999 libxml-devel-1.8.y can be kept simultaneously)</li>
6000 <li>remove your config.cache, relaunch your configuration mechanism, and
6001 recompile, if steps 2 and 3 were done right it should compile as-is</li>
6002 <li>Test that your application is still running correctly, if not this may
6003 be due to extra empty nodes due to formating spaces being kept in libxml2
6004 contrary to libxml1, in that case insert xmlKeepBlanksDefault(1) in your
6005 code before calling the parser (next to
6006 <strong>LIBXML_TEST_VERSION</strong> is a fine place).</li>
6009 <p>Following those steps should work. It worked for some of my own code.</p>
6011 <p>Let me put some emphasis on the fact that there is far more changes from
6012 libxml 1.x to 2.x than the ones you may have to patch for. The overall code
6013 has been considerably cleaned up and the conformance to the XML specification
6014 has been drastically improved too. Don't take those changes as an excuse to
6015 not upgrade, it may cost a lot on the long term ...</p>
6017 <h2><a name="Thread">Thread safety</a></h2>
6019 <p>Starting with 2.4.7, libxml2 makes provisions to ensure that concurrent
6020 threads can safely work in parallel parsing different documents. There is
6021 however a couple of things to do to ensure it:</p>
6023 <li>configure the library accordingly using the --with-threads options</li>
6024 <li>call xmlInitParser() in the "main" thread before using any of the
6025 libxml2 API (except possibly selecting a different memory allocator)</li>
6028 <p>Note that the thread safety cannot be ensured for multiple threads sharing
6029 the same document, the locking must be done at the application level, libxml
6030 exports a basic mutex and reentrant mutexes API in <libxml/threads.h>.
6031 The parts of the library checked for thread safety are:</p>
6033 <li>concurrent loading</li>
6034 <li>file access resolution</li>
6035 <li>catalog access</li>
6036 <li>catalog building</li>
6037 <li>entities lookup/accesses</li>
6039 <li>global variables per-thread override</li>
6040 <li>memory handling</li>
6043 <p>XPath has been tested for threaded usage on non-modified document
6044 for example when using libxslt, but make 100% sure the documents
6045 are accessed read-only !</p>
6047 <h2><a name="DOM"></a><a name="Principles">DOM Principles</a></h2>
6049 <p><a href="http://www.w3.org/DOM/">DOM</a> stands for the <em>Document
6050 Object Model</em>; this is an API for accessing XML or HTML structured
6051 documents. Native support for DOM in Gnome is on the way (module gnome-dom),
6052 and will be based on gnome-xml. This will be a far cleaner interface to
6053 manipulate XML files within Gnome since it won't expose the internal
6056 <p>The current DOM implementation on top of libxml2 is the <a
6057 href="http://svn.gnome.org/viewvc/gdome2/trunk/">gdome2 Gnome module</a>, this
6058 is a full DOM interface, thanks to Paolo Casarini, check the <a
6059 href="http://gdome2.cs.unibo.it/">Gdome2 homepage</a> for more
6062 <h2><a name="Example"></a><a name="real">A real example</a></h2>
6064 <p>Here is a real size example, where the actual content of the application
6065 data is not kept in the DOM tree but uses internal structures. It is based on
6066 a proposal to keep a database of jobs related to Gnome, with an XML based
6067 storage structure. Here is an <a href="gjobs.xml">XML encoded jobs
6069 <pre><?xml version="1.0"?>
6070 <gjob:Helping xmlns:gjob="http://www.gnome.org/some-location">
6074 <gjob:Project ID="3"/>
6075 <gjob:Application>GBackup</gjob:Application>
6076 <gjob:Category>Development</gjob:Category>
6079 <gjob:Status>Open</gjob:Status>
6080 <gjob:Modified>Mon, 07 Jun 1999 20:27:45 -0400 MET DST</gjob:Modified>
6081 <gjob:Salary>USD 0.00</gjob:Salary>
6082 </gjob:Update>
6084 <gjob:Developers>
6085 <gjob:Developer>
6086 </gjob:Developer>
6087 </gjob:Developers>
6089 <gjob:Contact>
6090 <gjob:Person>Nathan Clemons</gjob:Person>
6091 <gjob:Email>nathan@windsofstorm.net</gjob:Email>
6092 <gjob:Company>
6093 </gjob:Company>
6094 <gjob:Organisation>
6095 </gjob:Organisation>
6096 <gjob:Webpage>
6097 </gjob:Webpage>
6098 <gjob:Snailmail>
6099 </gjob:Snailmail>
6102 </gjob:Contact>
6104 <gjob:Requirements>
6105 The program should be released as free software, under the GPL.
6106 </gjob:Requirements>
6109 </gjob:Skills>
6111 <gjob:Details>
6112 A GNOME based system that will allow a superuser to configure
6113 compressed and uncompressed files and/or file systems to be backed
6114 up with a supported media in the system. This should be able to
6115 perform via find commands generating a list of files that are passed
6116 to tar, dd, cpio, cp, gzip, etc., to be directed to the tape machine
6117 or via operations performed on the filesystem itself. Email
6118 notification and GUI status display very important.
6119 </gjob:Details>
6124 </gjob:Helping></pre>
6126 <p>While loading the XML file into an internal DOM tree is a matter of
6127 calling only a couple of functions, browsing the tree to gather the data and
6128 generate the internal structures is harder, and more error prone.</p>
6130 <p>The suggested principle is to be tolerant with respect to the input
6131 structure. For example, the ordering of the attributes is not significant,
6132 the XML specification is clear about it. It's also usually a good idea not to
6133 depend on the order of the children of a given node, unless it really makes
6134 things harder. Here is some code to parse the information for a person:</p>
6138 typedef struct person {
6146 } person, *personPtr;
6149 * And the code needed to parse it
6151 personPtr parsePerson(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) {
6152 personPtr ret = NULL;
6154 DEBUG("parsePerson\n");
6156 * allocate the struct
6158 ret = (personPtr) malloc(sizeof(person));
6160 fprintf(stderr,"out of memory\n");
6163 memset(ret, 0, sizeof(person));
6165 /* We don't care what the top level element name is */
6166 cur = cur->xmlChildrenNode;
6167 while (cur != NULL) {
6168 if ((!strcmp(cur->name, "Person")) && (cur->ns == ns))
6169 ret->name = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
6170 if ((!strcmp(cur->name, "Email")) && (cur->ns == ns))
6171 ret->email = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
6178 <p>Here are a couple of things to notice:</p>
6180 <li>Usually a recursive parsing style is the more convenient one: XML data
6181 is by nature subject to repetitive constructs and usually exhibits highly
6182 structured patterns.</li>
6183 <li>The two arguments of type <em>xmlDocPtr</em> and <em>xmlNsPtr</em>,
6184 i.e. the pointer to the global XML document and the namespace reserved to
6185 the application. Document wide information are needed for example to
6186 decode entities and it's a good coding practice to define a namespace for
6187 your application set of data and test that the element and attributes
6188 you're analyzing actually pertains to your application space. This is
6189 done by a simple equality test (cur->ns == ns).</li>
6190 <li>To retrieve text and attributes value, you can use the function
6191 <em>xmlNodeListGetString</em> to gather all the text and entity reference
6192 nodes generated by the DOM output and produce an single text string.</li>
6195 <p>Here is another piece of code used to parse another level of the
6197 <pre>#include <libxml/tree.h>
6199 * a Description for a Job
6201 typedef struct job {
6207 personPtr developers[100]; /* using dynamic alloc is left as an exercise */
6211 * And the code needed to parse it
6213 jobPtr parseJob(xmlDocPtr doc, xmlNsPtr ns, xmlNodePtr cur) {
6216 DEBUG("parseJob\n");
6218 * allocate the struct
6220 ret = (jobPtr) malloc(sizeof(job));
6222 fprintf(stderr,"out of memory\n");
6225 memset(ret, 0, sizeof(job));
6227 /* We don't care what the top level element name is */
6228 cur = cur->xmlChildrenNode;
6229 while (cur != NULL) {
6231 if ((!strcmp(cur->name, "Project")) && (cur->ns == ns)) {
6232 ret->projectID = xmlGetProp(cur, "ID");
6233 if (ret->projectID == NULL) {
6234 fprintf(stderr, "Project has no ID\n");
6237 if ((!strcmp(cur->name, "Application")) && (cur->ns == ns))
6238 ret->application = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
6239 if ((!strcmp(cur->name, "Category")) && (cur->ns == ns))
6240 ret->category = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
6241 if ((!strcmp(cur->name, "Contact")) && (cur->ns == ns))
6242 ret->contact = parsePerson(doc, ns, cur);
6249 <p>Once you are used to it, writing this kind of code is quite simple, but
6250 boring. Ultimately, it could be possible to write stubbers taking either C
6251 data structure definitions, a set of XML examples or an XML DTD and produce
6252 the code needed to import and export the content between C data and XML
6253 storage. This is left as an exercise to the reader :-)</p>
6255 <p>Feel free to use <a href="example/gjobread.c">the code for the full C
6256 parsing example</a> as a template, it is also available with Makefile in the
6257 Gnome SVN base under libxml2/example</p>
6259 <h2><a name="Contributi">Contributions</a></h2>
6261 <li>Bjorn Reese, William Brack and Thomas Broyer have provided a number of
6262 patches, Gary Pennington worked on the validation API, threading support
6263 and Solaris port.</li>
6264 <li>John Fleck helps maintaining the documentation and man pages.</li>
6265 <li><a href="mailto:igor@zlatkovic.com">Igor Zlatkovic</a> is now the
6266 maintainer of the Windows port, <a
6267 href="http://www.zlatkovic.com/projects/libxml/index.html">he provides
6269 <li><a href="mailto:Gary.Pennington@sun.com">Gary Pennington</a> provides
6270 <a href="http://garypennington.net/libxml2/">Solaris binaries</a></li>
6272 href="http://mail.gnome.org/archives/xml/2001-March/msg00014.html">Matt
6273 Sergeant</a> developed <a
6274 href="http://axkit.org/download/">XML::LibXSLT</a>, a Perl wrapper for
6275 libxml2/libxslt as part of the <a href="http://axkit.com/">AxKit XML
6276 application server</a></li>
6277 <li><a href="mailto:fnatter@gmx.net">Felix Natter</a> and <a
6278 href="mailto:geertk@ai.rug.nl">Geert Kloosterman</a> provide <a
6279 href="libxml-doc.el">an emacs module</a> to lookup libxml(2) functions
6281 <li><a href="mailto:sherwin@nlm.nih.gov">Ziying Sherwin</a> provided <a
6282 href="http://xmlsoft.org/messages/0488.html">man pages</a></li>
6283 <li>there is a module for <a
6284 href="http://acs-misc.sourceforge.net/nsxml.html">libxml/libxslt support
6285 in OpenNSD/AOLServer</a></li>
6286 <li><a href="mailto:dkuhlman@cutter.rexx.com">Dave Kuhlman</a> provided the
6287 first version of libxml/libxslt <a
6288 href="http://www.rexx.com/~dkuhlman">wrappers for Python</a></li>
6289 <li>Petr Kozelka provides <a
6290 href="http://sourceforge.net/projects/libxml2-pas">Pascal units to glue
6291 libxml2</a> with Kylix and Delphi and other Pascal compilers</li>
6292 <li><a href="mailto:aleksey@aleksey.com">Aleksey Sanin</a> implemented the
6293 <a href="http://www.w3.org/Signature/">XML Canonicalization and XML
6294 Digital Signature</a> <a
6295 href="http://www.aleksey.com/xmlsec/">implementations for libxml2</a></li>
6296 <li><a href="mailto:Steve.Ball@explain.com.au">Steve Ball</a> and
6297 contributors maintain <a href="http://tclxml.sourceforge.net/">tcl
6298 bindings for libxml2 and libxslt</a>, as well as <a
6299 href="http://tclxml.sf.net/tkxmllint.html">tkxmllint</a> a GUI for
6300 xmllint and <a href="http://tclxml.sf.net/tkxsltproc.html">tkxsltproc</a>
6301 a GUI for xsltproc.</li>