1  <?xml version="1.0"?>
 2  <!DOCTYPE doc [
 3  <!ELEMENT doc (tst)*>
 4  <!ELEMENT tst (#PCDATA)>
 5  <!ATTLIST tst a NMTOKENS #IMPLIED>
 6  <!ATTLIST tst b CDATA #IMPLIED>
 7  <!ENTITY d "&#xD;">
 8  <!ENTITY a "&#xA;">
 9  <!ENTITY da "&#xD;&#xA;">
10  ]>
11  <doc>
12  <tst a="xyz" b="  xyz"/>
13  <tst a="&d;&d;A&a; &a;B&da;" b="&d;&d;A&a; &a;B&da;"/>
14  <tst a="&#13;&#13;A&#10;&#10;B&#13;&#10;" b="&#13;&#13;A&#10;&#10;B&#13;&#10;"/>
15  <tst a="x y" b=" x  y "/>
16  <tst a="a b" b=" a b "/>
17  <tst a="a b" b="  a  b  "/>
18  </doc>