Re: [core] Martin Duke's No Objection on draft-ietf-core-senml-versions-03: (with COMMENT)

Carsten Bormann <cabo@tzi.org> Thu, 03 June 2021 20:12 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Thu, 3 Jun 2021 22:11:54 +0200
Cc: The IESG <iesg@ietf.org>, draft-ietf-core-senml-versions@ietf.org, core-chairs@ietf.org, "core@ietf.org WG" <core@ietf.org>, jaime@iki.fi
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Subject: Re: [core] Martin Duke's No Objection on draft-ietf-core-senml-versions-03: (with COMMENT)
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On 2021-05-26, at 17:33, Martin Duke via Datatracker <noreply@ietf.org> wrote:
> 
> Martin Duke has entered the following ballot position for
> draft-ietf-core-senml-versions-03: No Objection
> 
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
> 
> Given the very constrained space, I wonder if it's wise to reserve 0 and 2 for
> no real purpose. IIUC these would still result in version numbers > 10 and
> therefore not break anything, yes?

Hi Martin,

The cop-out (end of Section 3) is:

   These four reserved feature codes are not to be used with any
   more specific semantics except in a specification that updates the
   present specification.

So we still can use these bits, we just haven’t said yet, how.
But indeed, we could have used 0 and 2 as the first bits to be allocated (much harder to do anything useful with 1 and 3).
Not sure we want to change this now to reclaim those bits now, but we still could.
Any reaction, CoRE WG?

Grüße, Carsten