def set_attribute_xsi_type(self, el, **kw):
if kw.get('<STR_LIT>', self.typed):<EOL><INDENT>namespaceURI,typeName = kw.get('<STR_LIT:type>', _get_xsitype(self))<EOL>if namespaceURI and typeName:<EOL><INDENT>self.logger.debug("<STR_LIT>", namespaceURI, typeName)<EOL>el.setAttributeType(namespaceURI, typeName)<EOL><DEDENT><DEDENT>
if typed, set the xsi:type attribute 
        Paramters:
            el -- MessageInterface representing the element