I don't see XML and json as different at all - they are both markup languages that describe trees. As long as what you are describing is a tree, either is fine.

I don't see XML and json as different at all - they are both markup languages that describe trees. As long as what you are describing is a tree, either is fine. Of course, I would never do an XML endpoint on a rest http service since no one would expect that and they would assume that you don't know what you are doing and your service sucks.