or download this
validate
eval { $xmlschema->validate( $doc ); };
This function allows to validate a (parsed) document against the given
+ XML Schema. The argument of this function should be a XML::LibXML::D
+ocument object. If this function succeeds, it will return 0, otherwis
+e it will die() and report the errors found. Because of this validate
+() should be always evaluated.