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Re: [Iot-directorate] [Last-Call] Segmented strings (Re: [Rats] EAT profiles (was Re: Iotdir last call review of draft-ietf-rats-eat-13))

"Martin J. Dürst" <duerst@it.aoyama.ac.jp> Fri, 10 June 2022 06:50 UTC

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Date: Fri, 10 Jun 2022 15:50:40 +0900
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To: Laurence Lundblade <lgl@island-resort.com>, Carsten Bormann <cabo@tzi.org>
Cc: Eliot Lear <lear@cisco.com>, iot-directorate@ietf.org, draft-ietf-rats-eat.all@ietf.org, last-call@ietf.org, rats <rats@ietf.org>, cbor@ietf.org
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From: "Martin J. Dürst" <duerst@it.aoyama.ac.jp>
Organization: Aoyama Gakuin University
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Subject: Re: [Iot-directorate] [Last-Call] Segmented strings (Re: [Rats] EAT profiles (was Re: Iotdir last call review of draft-ietf-rats-eat-13))
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Hello Laurence, others,

On 2022-06-10 04:57, Laurence Lundblade wrote:
> 
>> On Jun 9, 2022, at 12:30 PM, Carsten Bormann <cabo@tzi.org> wrote:
>>
>> On 2022-06-09, at 21:17, Laurence Lundblade <lgl@island-resort.com> wrote:
>>>
>>> One person legitimately implements sending EATS with  segmented strings  Another person legitimately implements without being able to decode  segmented strings.
>>
>> Well, an implementation that doesn’t handle segmented strings may be “legitimate”, but it won’t be a complete implementation (and thus not interoperable) if you decide EAT to make no restrictions on generating segmented strings.
> 
> Maybe use the term “fully conforming” rather than “legitimate” or “complete” where "fully conforming" means adherence to what is in the specification and its normative references and no more. No tacit assumptions about the way typical libraries behave or their level of completeness are required to guarantee interoperability.

"fully conforming" doesn't sound right to me. I'd expect everybody to 
expect that two fully conforming implementations would be guaranteed to 
interoperate.

What about "minimally conforming"? "Two minimally conforming 
implementations are not guaranteed to interoperate." sounds much more 
reasonable than "Two fully conforming implementations are not guaranteed 
to interoperate."

Regards,   Martin.

> I kind of expected the IETF to harass me if fully conforming implementations of something I wrote aren’t 100% guaranteed interoperable. That during review all the nooks and crannies where there might be interoperability issues would be ferreted out.
> 
> LL

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