Peoples, I have attached an XML document that uses the SwitchingService, AdaptationService and DeadaptationService to model the concepts of NSI Service Domains and Adaptation. This uses a modified NML NSI-EXT schema that is not yet approved (it is also included). Although syntactically correct, I am not 100% sure it will meet our needs until i try to build a path finding graph using the new information. i will try to do prototype this week. John.