Re: [Cbor] [Cacao] Public Comment for CACAO Draft

Bret Jordan <> Wed, 16 December 2020 02:43 UTC

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From: Bret Jordan <>
Date: Tue, 15 Dec 2020 19:43:33 -0700
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To: Carsten Bormann <>
Cc: Bret Jordan <>, Michael Richardson <>, cacao <>,, Bret Jordan <>,
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Subject: Re: [Cbor] [Cacao] Public Comment for CACAO Draft
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Perhaps I can work on an ID for this and submit it to the CBOR working
group? We have done very similar things in STIX and TAXII as well. So it
would be good for me to take all the content I have written and done for
all three of this specifications (STIX, TAXII, and CACAO) and put them
together in a single ID that you and others can help with and comb through
with a fine tooth comb.  Does that seem reasonable to you?

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On Tue, Dec 15, 2020 at 4:45 PM Carsten Bormann <> wrote:

> Hi Bret,
> On 2020-12-15, at 21:38, Bret Jordan <bret.jordan=
>> wrote:
> >
> > Or can we get a working group for this kind of work.
> I would consider a document that defines vocabulary like this to be a good
> component for CDDL, which the CBOR WG already is chartered to evolve.  A
> bit like a modern version of the good parts of part 2 of WSD [1], which is
> probably still the best document of that kind that we have.
> (Clearly, I’m not suggesting that CACAO wait for this to spring up, I just
> see the CACAO document as another item to look at that motivates finally
> doing this.)
> Grüße, Carsten
> [1]:
> (Oh, and the difference between a 54-bit two's-complement signed integer
> and an I-JSON integer is that the former includes an INT54_MIN of -2**53,
> while the latter doesn’t (*), which you correctly copied from I-JSON —
> int54 may be vernacular for the latter, but this is off-by-one.  This
> little factoid is pretty much inconsequential (**) for CACAO, but a
> document like the above would get this detail right.)
> (*) because it actually does include both +0 and -0.
> (**) INT54_MIN *can* be represented in the typical JSON implementation
> number systems that I-JSON was accommodating, as can be 2**53 — it’s just
> no longer uniquely distinguishable from INT54_MIN-1 or 2**53+1.  So this
> little mistake is even more innocuous.
> --
> Cacao mailing list

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