I attach a document that describes NSI in WS terms. I would like to discuss it tomorrow on the call. I am thinking perhaps we should stick to WS terminology and concepts for the first draft at least in order to make progress. I have taken the terminology from reading WS doc. It turns out to be slightly different than what we were using before, mostly in emphasis. In particular, the distinction between agent and actor is a little fuzzier, with the interface being between requestor agent that wants the service for its owner and provider agent that supplies the service. Actors come in only when discussing complex interactions between entities in particular infrastructure implementations. I think this is helpful also in thinking about service plane and what it is, though this doc does not deal with that. John