def getQNameAttribute(self, collection, attribute):
tdc = self.getAttributeQName(attribute)<EOL>if not tdc:<EOL><INDENT>return<EOL><DEDENT>obj = self.getSchemaItem(collection, tdc.getTargetNamespace(), tdc.getName())<EOL>if obj: <EOL><INDENT>return obj<EOL>
returns object instance representing QName --> (namespace,name),
           or if does not exist return None.
           attribute -- an information item attribute, with a QName value.
           collection -- collection in parent Schema instance to search.