Attached is a revised outline of architecture doc. I list the sections below. The doc has some detail about what might be in each section. Comments are most welcome. Also volunteers to write portions. Thanks for your review. John The idea is to describe step by step pieces of the architecture. Each section (after the first 2) has some implications for the interface that will be included. 1. Abstract and Summary 2. Context and Motivation 3. NS Interface concepts and terminology [define NSI in general and Transport /NSI ] 4. NSI Transport Service Description [define Transport Service offerred over the interface] 5. Transport Service actors [define actor with multiple agents] 6. Interoperating Transport Actors [describe multiple actors] 7. Infrastructures of NS Actors (describe different types of multi- actor infrastructures) Appendix - compare architecture capabilities of existing implementations vs architecture