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Re: [Json] [Technical Errata Reported] RFC7493 (5354)

"Matthew A. Miller" <linuxwolf+ietf@outer-planes.net> Fri, 11 May 2018 18:38 UTC

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Sender: Matthew Miller <linuxwolf@outer-planes.net>
Cc: Carsten Bormann <cabo@tzi.org>, Anders Rundgren <anders.rundgren.net@gmail.com>, Joe Hildebrand <hildjj@cursive.net>, json@ietf.org
References: <20180510050214.916C4B81EA7@rfc-editor.org> <4EB0B6DE-2416-4909-9EDA-975439055F33@cursive.net> <b23ce436-22c3-17bf-c830-59ee88b9fc2f@gmail.com> <dea9478a-6752-b723-a303-ef3544c57f33@gmail.com> <595C4165-6AED-4D0B-A286-A53BC605E631@tzi.org>
To: RFC Errata System <rfc-editor@rfc-editor.org>, Ben Campbell <ben@nostrum.com>, Alexey Melnikov <aamelnikov@fastmail.fm>, Adam Roach <adam@nostrum.com>
From: "Matthew A. Miller" <linuxwolf+ietf@outer-planes.net>
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Date: Fri, 11 May 2018 12:38:49 -0600
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Subject: Re: [Json] [Technical Errata Reported] RFC7493 (5354)
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RFC Editor and AD, please reject errata 5354 of RFC 7493.

Thank you to all in evaluating.



- m&m

Matthew A. Miller
On 18/05/11 07:24, Carsten Bormann wrote:
> On May 11, 2018, at 10:21, Anders Rundgren <anders.rundgren.net@gmail.com> wrote:
>>
>> Since we presumably agree on that integers represented as JSON Numbers can (in a scheme constrained by IEEE-754 double precision), cover exactly the range -(2**53) to 2**53, the issue boils down to the ability validating that you actually are sending or receiving integers within that range.
> 
> As I mentioned, you can’t validate that you are receiving -2**53, with a stock, fully interoperable I-JSON decoder implementation.
> 
> Both ECMAScript and I-JSON are right in taking out 2**53 out of the safe space.
> 
> (And, of course, lots more integers can be represented in binary64, e.g. all numbers 2**53+2*n where n is an unsigned integer < 2**52.  This is just not very useful for interoperable exchange of integers via JSON; neither for n=0 nor for other values of n.)
> 
>> Feel free rejecting this errata report.  
> 
> Yes, that is what should be done.
> 
>> Personally, I stick to “int53".
> 
> (int54, if such a thing existed, is still not I-JSON safe at MININT54 = -2**53.)
> 
> Grüße, Carsten
> 
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