[netmod] rfc6991bis: yang:percentage

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Fri, 17 July 2020 19:16 UTC

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Date: Fri, 17 Jul 2020 21:16:38 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: netmod@ietf.org
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Subject: [netmod] rfc6991bis: yang:percentage
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  - Percentages are frequently used in YANG models but usages differ a
    lot in precision and range. It is not clear what the proper
    generic definition of a percentage type would be and whether it is
    worth having it.

    RFC 7950 example:

         typedef percent { type uint8 { range "0 .. 100"; } }

    RFC 8294:

         typedef percentage { type uint8 { range "0..100"; } }

    I-Ds:
         typedef percentage { type decimal64 { fraction-digits 5; } }
         typedef percentile { type decimal64 { fraction-digits 2; } }

    The yang catalogue seems to be down. :-(

  - Proposal: do not add a percentage type since it is trivial to
    define a context specific percentage type that matches range and
    precision requirements (and there is already a definition in RFC
    8294 for those who need exactly that definition).

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <https://www.jacobs-university.de/>