<?xml  version="1.0"?>
<!-- validity test for Production 60-->
<!DOCTYPE Java 
 [
 <!ELEMENT Java ANY>
 <!ELEMENT one EMPTY>
 <!ELEMENT two EMPTY>
 <!ATTLIST one chapter CDATA #REQUIRED>
 <!ATTLIST two chapter CDATA #REQUIRED>
 ]>
<Java>
<one chapter="Introduction"></one>
<two></two>
Negative test for Required Attribute. Some occurrence of an element with 
an attribute of #REQUIRED default declaration does not give the value of 
those attribute
</Java>