test/VCM/v21.xml - third_party/github.com/GNOME/libxml2 - Git at Google

 <!DOCTYPE doc [
 <!ELEMENT doc ((a | b)+, c) >
 <!ELEMENT a EMPTY>
 <!ELEMENT b EMPTY>
 <!ELEMENT c EMPTY>
 ]>
 <doc><a/><b/><c/></doc>
	<!DOCTYPE doc [
	<!ELEMENT doc ((a \| b)+, c) >
	<!ELEMENT a EMPTY>
	<!ELEMENT b EMPTY>
	<!ELEMENT c EMPTY>
	]>
	<doc><a/><b/><c/></doc>