<?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 "I">
	<!ENTITY mylast 'Man &myfirst; and &myfirst; mymiddle;.'>
]>
<!-- testing AttValue with references combination in single quote -->
<student first='Full Name &myfirst; and &#x22;&mylast;&#x22; &mylast;' last='&mylast;'>My first Name is &myfirst; and my last name is &mylast;. </student>