3 <!ELEMENT tst (#PCDATA)>
4 <!ATTLIST tst a NMTOKENS #IMPLIED>
5 <!ATTLIST tst b CDATA #IMPLIED>
8 <!ENTITY da "
">
16 <tst a="&d;&d;A&a; &a;B&da;" b="&d;&d;A&a; &a;B&da;"/>
17 <tst a="

A

B
" b="

A

B
"/>
18 <tst a=" x  y " b=" x  y "/>
19 <tst a=" a b " b=" a b "/>
20 <tst a=" a b " b=" a b "/>