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Re: [Cbor] CDDL for COSE + EAT/CWT + SUIT + CoSIWD

Carsten Bormann <cabo@tzi.org> Wed, 08 December 2021 12:36 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Wed, 08 Dec 2021 13:36:42 +0100
Cc: Laurence Lundblade <lgl@island-resort.com>, cose <cose@ietf.org>, "cbor@ietf.org" <cbor@ietf.org>, Henk Birkholz <henk.birkholz@sit.fraunhofer.de>
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To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
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Subject: Re: [Cbor] CDDL for COSE + EAT/CWT + SUIT + CoSIWD
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On 2021-12-08, at 13:30, Hannes Tschofenig <Hannes.Tschofenig@arm.com> wrote:
> 
> EAT by itself is not really an interoperable spec. COSE on its own is not interoperable either. 

If I guess about the definition of "interoperable spec” you are using here, ASCII is not an interoperable spec either - you still have to agree on what the text means…  Still, ASCII was kind of useful as the basis for a lot of interoperability, I think.

I think the point here was to shape some CDDL that makes it easier to talk about the way a more specific (interoperable?) spec uses COSE (which does have CDDL, just not in a way that usually can be integrated as-is to express the additional constraints a COSE-using specification typically makes).

Grüße, Carsten

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