<?xml  version="1.0"?>
<!-- syntax test for Production 63-->
<!DOCTYPE animal SYSTEM "ibm63v03.dtd"
[
<!ELEMENT animal ANY>
<!ELEMENT tiger (#PCDATA)>
<!ATTLIST animal a (tiger) #REQUIRED> 
]>
<animal a = "tiger">
Positive test. Test for IGNORE with pattern 3.
</animal>