Impact of xpathDefaultNamespace locally and globally on key/keyref/unique selection expressions unique selection expressions unique selection expressions 2 key selection expressions_1 key selection expressions_2 key/keyref selection expressions_1 key/keyref selection expressions_2 invalid instance unique selection expressions_1 invalid instance unique selection expressions_2 invalid instance unique selection expressions_3 invalid instance key selection expressions_1 invalid instance key selection expressions_2 invalid instance key/keyref selection expressions_1 invalid instance key/keyref selection expressions_2