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 primarily for the benefit of the operational area directors. Document editors and WG chairs should treat these comments just like any other last call comments.   I find the document is written very clear, except a minor typo:   Section 7.1 third line: extra “.”.     Question: Can the “Match”, the “Action”, and the “Match Operators” be also used for I2RS rules? Or IDR FlowSpec rules?     Linda