"http://www.boost.org/tools/boostbook/dtd/boostbook.dtd">
<library-reference id="concepts.reference"
xmlns:xi="http://www.w3.org/2001/XInclude"
- last-revision="$Date: 2009-07-26 16:11:03 -0400 (Sun, 26 Jul 2009) $">
+ last-revision="$Date$">
<sectioninfo>
<copyright>
<year>2001</year>