<?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"'>
]>
<!-- testing AttValue string with a double quote inside -->
<student first='Snow"' last='Man'>My Name is &myfirst; &mylast;. </student>