result/xml2 - third_party/libxml2 - Git at Google

 <?xml version="1.0"?>
 <!DOCTYPE test [
 <!ELEMENT test (#PCDATA)>
 <!ENTITY % xx "&#37;zz;">
 <!ENTITY % zz '&#60;!ENTITY tricky "error-prone" >'>
 <!ENTITY tricky "error-prone">
 ]>
 <test>This sample shows a &tricky; method.</test>
	<?xml version="1.0"?>
	<!DOCTYPE test [
	<!ELEMENT test (#PCDATA)>
	<!ENTITY % xx "%zz;">
	<!ENTITY % zz '<!ENTITY tricky "error-prone" >'>
	<!ENTITY tricky "error-prone">
	]>
	<test>This sample shows a &tricky; method.</test>