<?xml version="1.0"?>
<!DOCTYPE root [
  <!ELEMENT root ANY>
  <!ELEMENT a (#PCDATA)* >
  <!ELEMENT b (#PCDATA) >
  <!--* All AttlistDecl Patterns in P52 and P53 *-->
  <!ATTLIST a>
  <!ATTLIST a >
  <!ATTLIST b battr1 CDATA #REQUIRED >
  <!ATTLIST b battr2 CDATA #IMPLIED 
              battr3 CDATA #FIXED "fixedvalue" battr4 (abc|def) "abc" >
]>
<root>
  <a> Element type a </a>
  <b battr1 = "anyvalue" battr3="fixedvalue" battr4 ="def"> test P52 and P53 </b>
</root>
<!--* a valid test: tests P52 and P53 *-->