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Re: [core] [Last-Call] Last Call: <draft-ietf-core-senml-more-units-02.txt> (Additional Units for SenML) to Proposed Standard

Cullen Jennings <fluffy@iii.ca> Thu, 31 October 2019 14:54 UTC

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From: Cullen Jennings <fluffy@iii.ca>
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Date: Thu, 31 Oct 2019 08:54:37 -0600
Cc: Ari Keränen <ari.keranen=40ericsson.com@dmarc.ietf.org>, "draft-ietf-core-senml-more-units@ietf.org" <draft-ietf-core-senml-more-units@ietf.org>, IETF Crazy <ietf@ietf.org>, "Gillmore, Matthew" <Matthew.Gillmore@itron.com>, "core-chairs@ietf.org" <core-chairs@ietf.org>, core <core@ietf.org>, Pete Resnick <resnick@episteme.net>, "last-call@ietf.org" <last-call@ietf.org>
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References: <41C0F8EE-6A11-4B07-BA18-7DE106F03183@episteme.net> <CEE49F5A-E7FE-4933-BF68-E1A2EA8CEC62@ericsson.com> <DF78FB17-0DDA-471E-A28A-15AC0718F653@iii.ca> <AM6PR0602MB3368610C8BAD09D5E938C2BEF5630@AM6PR0602MB3368.eurprd06.prod.outlook.com>
To: Hytonen Harri <harri.hytonen@vaisala.com>
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Subject: Re: [core] [Last-Call] Last Call: <draft-ietf-core-senml-more-units-02.txt> (Additional Units for SenML) to Proposed Standard
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> On Oct 31, 2019, at 1:17 AM, Hytonen Harri <harri.hytonen@vaisala.com> wrote:
> 
> On Oct 30, 2019, at 17:21, Cullen Jennings <fluffy@iii.ca <mailto:fluffy@iii.ca>>  wrote:
>> So let's get back to the fundamental issue. Why are we doing this? Some other SDO wants it is not really an answer. Understanding why the other SDO wants it would be a
>> good answer. Do the reasons cause more good than interoperability problems that come out of it. I tried to get info from a few other SDO about this but I failed. I’d like to
>> hear more about why we should do this. I’m not seeing big value in the saving the floating point calc on the device but perhaps there is a compelling use case where that
>> matters that I am not thinking of.
> 
> As explained before, it's not matter of saving floating point calculations, but preserving the original precision of the measurement. 
> 
> BR,
> Harri Hytonen

I am not at all understanding this. Can you work me through an example ? I suspect that you might be giving senml more credit than it deserves.

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