John, See my comments in your G.805/G.800 document. I think that applying G.800 to a NSI network example as you have done here is an interesting exercise. I think the G.800 is a good model that looks well thought through and fits the NSI requirement for a vendor independent network description. G.800 is diagrammatic oriented, as far as I understand the use of this is that it can be used as an object oriented model for creating a database that describes a network in a network management system (TMN principles). But what we really need is a description language that will allow this network model to be exchanged over the NSI interface. I guess the process of creating such a language is the role of the NML group. As far as I can see ITU-T does not have anything like this for G.800 (because it is an object oriented database model only?). Perhaps Freek can comment on this in tomorrow's call. Guy ------------------------------------------------------------------------------------------------------------------ Guy Roberts, Ph.D Network Engineering & Planning DANTE - www.dante.net<http://www.dante.net/> Tel: +44 (0)1223 371 316 City House, 126-130 Hills Road Cambridge, CB2 1PQ, UK ------------------------------------------------------------------------------------------------------------------