Attached is a DCN glossary which is part of DCN architecture and DCN reservation documents. Of particular note are some terms we use that don't seem to be in the NML schema (perhaps I am wrong?) path - a connection between a source and destination. A path is a sequence of hops. source - starting point of path - as defined by direction of signalling destination - end point of path- as defined by direction of signalling hop - a network element - [domain or node or port or link] path segment - subset of a path consisting of two or more hops circuit - a connection between tow endpoints that can be used to transmit data between them I note that in the glossary some information is assumed, in at least some of the definitions. In particular, a path (perhaps a DCN path) must include time/duration and resource. That is, a Link may carry multiple paths at a given time, and may carry different paths sequentially. I am wondering if this or something like it can be incorporated (or is incorporated) in NML. John John Vollbrecht, Senior Network Engineer Internet2 office +1-734-352-4960 | mobile +1-734-395-7890