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[Cbor] draft-ietf-cbor-cddl-control-00 should add CDDL notation for CBOR Sequences

John Mattsson <john.mattsson@ericsson.com> Thu, 05 November 2020 12:49 UTC

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From: John Mattsson <john.mattsson@ericsson.com>
To: "cbor@ietf.org" <cbor@ietf.org>
Thread-Topic: draft-ietf-cbor-cddl-control-00 should add CDDL notation for CBOR Sequences
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Date: Thu, 05 Nov 2020 12:49:48 +0000
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Subject: [Cbor] draft-ietf-cbor-cddl-control-00 should add CDDL notation for CBOR Sequences
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Hi,

I the most important missing piece in RFC 8610 is the lack of CDDL for CBOR Sequences (RFC 8742) and I think draft-ietf-cbor-cddl-control would be a good place to add CDDL for that.

CBOR sequences has already been standardized in RFC 8742. CBOR sequences are used quite heavily in IETF documents such as RFC 8769, draft-ietf-6tisch-minimal-security, draft-ietf-lake-edhoc, draft-palombini-core-oscore-edhoc, draft-mattsson-cose-cbor-cert-compress, etc.

I don't understand all the complexities of CDDL formalism, but this seems like a quite easy thing to solve. I do not care exactly which notation is used, but could we please just agree on something and put in a draft.

The notation could be something like:

- reuse the CDDL notation for group ( ... )
- reuse the Diagnostic Notation for CBOR sequences << ... >>
- Some modification of the CDDL array notation ] ... [
- Something looking like symbol swearing #$%@#$% ... #$%@#$%
...

Cheers,
John

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