<?xml  version="1.0"?>
<!-- validity test for Production 60-->
<!DOCTYPE test
 [
 <!ELEMENT test ANY>
 <!ELEMENT a EMPTY>
 <!ELEMENT b EMPTY>
 <!ELEMENT attr EMPTY>
 <!ATTLIST attr value (a|b) "c"> 
  ]>
<test>
The default value specified for an attribute does not meet the 
lexical constraints of the declared attribute type.
</test>