Instance repetitions occur of course when parameters are instantiated having constants
Instance repetitions occur of course when parameters are instantiated having constants Bags are employed here because the order of the attribute/value pairs in a frame is immaterial and the pairs may repeat. For instance, o[a->b a great->b]. For instance, o[?An effective->?B ?C->?D] becomes o[a->b a great->b] if variables ?A and ?C are instantiated with the