<?xml version="1.0"?>
<!DOCTYPE student [
	<!ELEMENT student (#PCDATA)>
	<!ATTLIST student first CDATA #REQUIRED
			  last  CDATA #IMPLIED>
]>

<!-- testing chardata with a string of sample legal char except '<' and '&' nor does it contain sequence "]]>" -->
<student first="Snow" last="Man">This is a test</student>