parse a schema definition resource and build an internal
           XML Shema struture which can be used to validate instances.

def schemaParse(self):
        """parse a schema definition resource and build an internal
           XML Shema struture which can be used to validate instances. """
        ret = libxml2mod.xmlSchemaParse(self._o)
        if ret is None:raise parserError('xmlSchemaParse() failed')
        __tmp = Schema(_obj=ret)
        return __tmp