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Re: [Cbor] Robert Wilton's No Objection on draft-ietf-cbor-date-tag-06: (with COMMENT)

"Rob Wilton (rwilton)" <rwilton@cisco.com> Thu, 03 September 2020 09:53 UTC

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From: "Rob Wilton (rwilton)" <rwilton@cisco.com>
To: Carsten Bormann <cabo@tzi.org>
CC: The IESG <iesg@ietf.org>, "draft-ietf-cbor-date-tag@ietf.org" <draft-ietf-cbor-date-tag@ietf.org>, "cbor@ietf.org" <cbor@ietf.org>, CBOR Working Group <cbor-chairs@ietf.org>, "francesca.palombini@ericsson.com" <francesca.palombini@ericsson.com>
Thread-Topic: [Cbor] Robert Wilton's No Objection on draft-ietf-cbor-date-tag-06: (with COMMENT)
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Date: Thu, 03 Sep 2020 09:53:17 +0000
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Subject: Re: [Cbor] Robert Wilton's No Objection on draft-ietf-cbor-date-tag-06: (with COMMENT)
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Hi Carsten,

> -----Original Message-----
> From: Carsten Bormann <cabo@tzi.org>
> Sent: 03 September 2020 10:06
> To: Rob Wilton (rwilton) <rwilton@cisco.com>
> Cc: The IESG <iesg@ietf.org>; draft-ietf-cbor-date-tag@ietf.org;
> cbor@ietf.org; CBOR Working Group <cbor-chairs@ietf.org>;
> francesca.palombini@ericsson.com
> Subject: Re: [Cbor] Robert Wilton's No Objection on draft-ietf-cbor-date-
> tag-06: (with COMMENT)
> 
> On 2020-09-03, at 11:03, Robert Wilton via Datatracker <noreply@ietf.org>
> wrote:
> >
> > I find the wording of "unsigned or negative" to be slightly jarring,
> presumably
> > written this way to include 0 in the set of allowed values.
> 
> Well, these are the two component major types we have in CBOR (0 for
> unsigned, 1 for negative) that together are used to span the integers, so
> I think we should stick with the established terminology.
[RW]

Personally, at least for the introduction, I think that seems to be conflating the date model (signed integer) with the encoding.

Certainly, I think that the more prevalent and established terminology for integers is that they can be positive, negative, or 0 rather than "unsigned and negative".

But these are just comments.  The authors/WG are free to do with them as they wish ;-)


On a side point, not directly related to this draft, I note that in draft-ietf-cbor-7049bis, section 3.1 Major Types has:

"Major type 0:  an integer in the range ..."

Would it make sense to change that to "an unsigned integer in the range ..." (given that major type 1 is "a negative integer ...")?

Regards,
Rob


> 
> Grüße, Carsten

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