Hi Jim,

I've read draft-mk-svcb-well-known-00. A clean, well-scoped draft. Defining 
"well-known" as a general primitive that other specifications can reference is 
the right design, and the motivating cases are persuasive.


I have a few questions:


1. Section 2.2, order preservation is specified, but not whether the same 
suffix may appear more than once in a list. For example, "A suffix SHOULD NOT 
appear more than once in a list; a decoder MUST tolerate duplicates"? Or is 
there a reason to leave this unspecified?


2. Section 2.2, "A suffix may extend below a registered well-known name where 
that registration allows it". How does an implementer tell whether a given 
registration allows subpaths? Would a concrete example be helpful?


3. Section 5, the draft advises publishers to keep advertisements compact. 
Would a brief operational note be added, or is the number of suffixes best left 
entirely to the publisher?


4. Section 7, I'd like to register support for the suffix-only choice; it 
matches the form used by IANA "Well-Known URIs" registry and saves octets on 
the wire. No change requested—just noting a preference among the open issues.


Best
Guozhen Dong


在 2026年9月16日 21:35,Jim Mozley<[email protected]> 写道:


Hi dnsop, This draft defines an SVCB and HTTPS record parameter for well-known 
URI path suffixes for services that use them. Your comments are most welcome. 
Regards, the authors > Begin forwarded message: > > A new version of 
Internet-Draft draft-mk-dnsop-svcb-well-known-00.txt has been > successfully 
submitted by Jim Mozley and posted to the > IETF repository. > > Name: 
draft-mk-dnsop-svcb-well-known > Revision: 00 > Title: An SVCB Service 
Parameter for Well-Known URI Paths > Date: 2026-09-16 > Group: Individual 
Submission > Pages: 9 > URL: 
https://www.ietf.org/archive/id/draft-mk-dnsop-svcb-well-known-00.txt > Status: 
https://datatracker.ietf.org/doc/draft-mk-dnsop-svcb-well-known > HTMLized: 
https://datatracker.ietf.org/doc/html/draft-mk-dnsop-svcb-well-known > > 
Abstract: > > This document defines the "well-known" Service Parameter Key > 
(SvcParamKey) for SVCB and HTTPS resource records. It carries one or > more 
well-known URI suffixes, identifying resources under "/.well- > known/" that 
are available at the service endpoint. It specifies the > presentation and wire 
formats and requests registration of the key > with IANA. > > > > The IETF 
Secretariat > > _______________________________________________ DNSOP mailing 
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