Allow eq/ne comparison of instances of same structured (complex or entity) type, allow eq/ne comparison with null for 0..1 nav props

can compare ordered collections: same members, same position can compare unordered collections: same members, any order. don't expect this to work though... can compare complex types by value (may fail if complex type contains unordered collection) -single-valued navigation properties reference the same entities -any collections of entities compare as equal -if unordered, reference the same entities in any order -if ordered, reference the same entities in same order can compare two entities (as being the same reference) ex: Person(1)/BestFriend eq Person(2)/WorstEnemy ex: Person(1)/BestFriend eq {"@odata.id":"/People(1)"} can compare entities to null: ex: Person(1)/BestFriend eq null