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[Cbor] Re: I-D Action: draft-mcnally-deterministic-cbor-10.html

"lgl island-resort.com" <lgl@island-resort.com> Wed, 31 July 2024 00:17 UTC

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From: "lgl island-resort.com" <lgl@island-resort.com>
To: Anders Rundgren <anders.rundgren.net@gmail.com>
Thread-Topic: [Cbor] I-D Action: draft-mcnally-deterministic-cbor-10.html
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Date: Wed, 31 Jul 2024 00:16:55 +0000
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CC: Wolf McNally <wolf@wolfmcnally.com>, Christopher Allen <ChristopherA@lifewithalacrity.com>, Joe Hildebrand <hildjj@cursive.net>, CBOR <cbor@ietf.org>, Shannon Appelcline <shannon.appelcline@gmail.com>, Carsten Bormann <cabo@tzi.org>
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> On Jul 30, 2024, at 5:01 PM, Anders Rundgren <anders.rundgren.net@gmail.com> wrote:
> 
> On 2024-07-30 23:58, Wolf McNally wrote:
> 
> <snip>
> 
>> It is on you to argue why deterministic encoding of identical semantics for such a common data type as “number” should be a secondary consideration, and you have so far failed to do this.
> 
> Wolf,
> 
> First off, nobody claims that numeric reduction doesn't work.  A variant of numeric reduction is even a part of RFC8949: 4.2.2 rule 1.
> 
> However, the CBOR WG presumably believe that separating integer and floating point values represents the preferred way to achieve determinism for numbers, otherwise they wouldn't have adopted the CDE draft as a WG item.

CDE has to be the main choice for CBOR in general because it preserves the entire CBOR data model (including NaN payloads). There must be a deterministic serialization for the whole CBOR data model. CDE is clearly it.

But that doesn’t mean another class of use cases can’t make another choice for their corner of the world. Wolf and friends are not trying to impose theirs outside of their corner so it is cool. Extra cool because dCBOR is built on top of CDE. :-)

Coexist!

LL

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