[DNSOP] Artart Last Call review of draft-ietf-dnsop-structured -dns-error-22

Reviewer: Paul Kyzivat
Review result: Ready with Issues

I am the assigned ARTART reviewer for this Internet-Draft.

Document: draft-ietf-dnsop-structured-dns-error-22
Reviewer: Paul Kyzivat
Review Date: 2026-06-19
IETF LC End Date: 2026-06-23
IESG Telechat date: ?

Summary: This draft is on the right track but has open issues, described 
in the review.

I previously reviewed version 12 of this document. All but one of my 
concerns from that review have been resolved in this version, and no new 
issues or nit have surfaced.

I continue to have one significant issue with the specification of 
"sips" URIs for specifying contacts. Do you have a use-case for this?

AFAIK there are few, if any, deployments of SIP servers that support use 
of "sips", or of email-style URIs. More typically, "sip" URIs are used, 
with a telephone number in the user part and a provider domain name. And 
requests are likely only accepted from limited sources.

A "tel" URI is more plausible, because it is typically understood and 
allows the client to invoke a call by any means available to them.

I suggest you omit "sips", unless you can also reference a mechanism for 
using it that is plausibly available to those likely to need to invoke 
it to resolve DNS errors.

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