ANT_17_BRANCH/src/etc/testcases/taskdefs/xmlproperty_withdtd.xml

<!DOCTYPE root-tag SYSTEM "xmlproperty_data.dtd">

 <root-tag myattr="true">
   <inner-tag someattr="val">Text</inner-tag>
   <a2><a3><a4>false</a4></a3></a2>
   <cdatatag><![CDATA[<test>]]></cdatatag>
 </root-tag>