<?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 "Man &myfirst; and &myfirst; mymiddle;.">
]>
<!-- testing AttValue with references combination in double quotes -->
<student first="Full Name &myfirst; &#x31; and &mylast; &mylast; &#x63;" last="&mylast;" >My first Name is &myfirst; and my last name is &mylast;. </student>