I reviewed this document as part of the Applications and Real-Time (ART) Area Review Team's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the ART Area Directors. Document authors, document editors, and WG Chairs should treat these comments just like any other IETF Last Call comments. Thanks for addressing my comments from a previous review of version -03. I believe that this latest version is ready. Best, /Marco