Re: [Cbor] I-D: draft-rundgren-cote-00
Carsten Bormann <cabo@tzi.org> Tue, 19 July 2022 14:06 UTC
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From: Carsten Bormann <cabo@tzi.org>
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Date: Tue, 19 Jul 2022 16:06:38 +0200
Cc: Anders Rundgren <anders.rundgren.net@gmail.com>, "rats@ietf.org" <rats@ietf.org>, cbor@ietf.org
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To: Christian Amsüss <christian@amsuess.com>
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Subject: Re: [Cbor] I-D: draft-rundgren-cote-00
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On 2022-07-19, at 15:52, Christian Amsüss <christian@amsuess.com> wrote: > > Signed PGP part > Hello Anders, > > On Tue, Jul 19, 2022 at 02:40:37PM +0200, Anders Rundgren wrote: >> Since I did neither make it to Philadelphia nor to the cut-off date, >> here is a private publishing: >> https://cyberphone.github.io/Internet-Drafts/draft-rundgren-cote.html > > Sounds reasonable to me, two comments: Agreeing with the below comments, but if I had my designated expert hat handy, I would say: This is underspecified as the specification does not really spend any effort ensuring that the type identifiers are unique to a specific usage. This is likely to lead to interoperability problems. I would think a few more things could be said about the type identifiers that would reduce these hazards. Re the example given: URLs in general are surprisingly bad as stable identifiers, while a few specific forms exist that are much better. > * Given that there are full URIs in there, compactness is barely a > concern. Thus, I'd appreciate if you asked for a tag from the range > above 256. Indeed. Going above 32768 would also take the designated expert out of the loop, so the format can be as foolish as one wants :-) > * Please consider what of RFC 6648 applies here. When would a protocol > author pick a type extension over a tag, and what would happen if such > a type extension becomes popular outside the community or application, > and maybe users push for registering an equivalent registered tag? This is part of a fundamental problem in a totally open type identifier system: Why would the generator spend effort fitting into an existing type when they can simply create another identifier? Such a system should instead nudge its users towards behavior that is in favor of more interoperability. I think we found a pretty good way to handle this problem in https://www.ietf.org/archive/id/draft-ietf-core-problem-details-08.html — yes, we do allow URIs in certain places, but we are even proposing a good class of URIs in the example. Grüße, Carsten
- [Cbor] I-D: draft-rundgren-cote-00 Anders Rundgren
- Re: [Cbor] I-D: draft-rundgren-cote-00 Christian Amsüss
- Re: [Cbor] I-D: draft-rundgren-cote-00 Carsten Bormann
- Re: [Cbor] I-D: draft-rundgren-cote-00 Joe Hildebrand
- Re: [Cbor] I-D: draft-rundgren-cote-00 Anders Rundgren
- Re: [Cbor] I-D: draft-rundgren-cote-00 Carsten Bormann
- Re: [Cbor] I-D: draft-rundgren-cote-00 Anders Rundgren
- Re: [Cbor] I-D: draft-rundgren-cote-00 Carsten Bormann
- Re: [Cbor] [Rats] I-D: draft-rundgren-cote-00 Michael Richardson
- Re: [Cbor] [Rats] I-D: draft-rundgren-cote-00 Anders Rundgren
- Re: [Cbor] [Rats] I-D: draft-rundgren-cote-00 Carsten Bormann
- [Cbor] Re draft-bormann-cbor-notable-tags Anders Rundgren
- Re: [Cbor] [Rats] I-D: draft-rundgren-cote-00 Thomas Fossati
- Re: [Cbor] [Rats] I-D: draft-rundgren-cote-00 Thomas Fossati