test/undeclared-entity.xml - third_party/libxml2 - Git at Google

 <!-- Having an external DTD makes undeclared entities a warning. -->
 <!DOCTYPE doc SYSTEM "foo">
 <doc>
     <elem attr="&undeclared;"/>
     <elem>&undeclared;</elem>
 </doc>
	<!-- Having an external DTD makes undeclared entities a warning. -->
	<!DOCTYPE doc SYSTEM "foo">
	<doc>
	<elem attr="&undeclared;"/>
	<elem>&undeclared;</elem>
	</doc>