jaxp/test/javax/xml/jaxp/unittest/catalog/system.xml

<?xml version="1.0"?>
<!DOCTYPE  catalogtest  PUBLIC  "-//OPENJDK//XML CATALOG DTD//1.0"  
     "http://openjdk.java.net/xml/catalog/dtd/system.dtd">
     
<catalogtest>Test &system; entry</catalogtest>