I am the assigned Gen-ART reviewer for this draft. The General Area Review Team (Gen-ART) reviews all IETF documents being processed by the IESG for the IETF Chair. Please treat these comments just like any other last call comments. For more information, please see the FAQ at . Document: draft-ietf-dnsop-iana-class-type-yang-02 Reviewer: Joel Halpern Review Date: 2021-05-14 IETF LC End Date: 2021-05-24 IESG Telechat date: Not scheduled for a telechat Summary: This document is ready for publication as a proposed standard. I do have two questions that I hope has already been considered by the WG and is a non-issue. See minor issues. Major issues: Minor issues: 1) I presume IANA has been involved in the development of this document, and is willing to undertake the maintenance? I looked for but did not see where that was noted. 2) I question the use of enumerations for the content. I understand that since IANA will generate new YANG modules when there is a change, the new models can have new values. I am concerned that if an implementation using the older schema reads data from a DNS repository with updated entries (and the corresponding updated version) the version skew will cause processing errors instead of simply handing over the numeric value in a fashion that is acceptable but not understood. Nits/editorial comments: