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[Cbor] Prefix compression (Re: Review draft-bormann-cbor-tags-oid-07)

Carsten Bormann <cabo@tzi.org> Sat, 04 July 2020 11:49 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Sat, 04 Jul 2020 13:48:56 +0200
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To: Jim Schaad <ietf@augustcellars.com>
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Subject: [Cbor] Prefix compression (Re: Review draft-bormann-cbor-tags-oid-07)
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Hi Jim,

On 2020-07-04, at 03:53, Jim Schaad <ietf@augustcellars.com> wrote:
> 
> An array of two hash functions which could be parsed into the two rooted OID values

Prefix compression is applicable to other data than OIDs (most prominently URIs).
I think we should handle that in a more generic way than specifically for OIDs.

(I had a short presentation at an IETF a couple of years ago about what I called “Tag 6 compression” because it had been around since about 2013 — I finally need to write this up.  It really works, and it is really low cost for a decoder...)

Grüße, Carsten

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