Reviewer: Carlos Martinez Review result: Ready I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written with the intent of improving the operational aspects of the IETF drafts. Comments that are not addressed in last call may be included in AD reviews during the IESG review. Document editors and WG chairs should treat these comments just like any other last call comments. Overall I've found this document to be READY. I do believe that some parts' readability could be improved however, particularly Section 5. This section describes some principles a potential implementation of the spec should follow but provides little or no justification for them. I believe additional text could help. Thank you to the authors for their great work! Carlos