<?xml version="1.0"?>
<!DOCTYPE student [
	<!ELEMENT student (#PCDATA)>
	<!ATTLIST student
		first CDATA #REQUIRED
		middle CDATA #IMPLIED
		last CDATA #REQUIRED > 
	<!ENTITY myfirst "Snow">
	<!ENTITY mymiddle "Y">
	<!ENTITY mylast '&myfirst; Man'>
]>
<!-- testing AttValue with a reference in single quote -->
<student first='&myfirst;' last='&mylast;'>My Name is &mylast;. </student>

