Re: [babel] [netmod] NULL value for uint16

Carsten Bormann <cabo@tzi.org> Tue, 14 September 2021 18:36 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Tue, 14 Sep 2021 20:36:12 +0200
Cc: "STARK, BARBARA H" <bs7652@att.com>, Babel at IETF <babel@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
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To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
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Subject: Re: [babel] [netmod] NULL value for uint16
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On 14. Sep 2021, at 19:17, Jürgen Schönwälder <j.schoenwaelder@jacobs-university.de> wrote:
> 
> If other data models use an extended integer range and -1 to indicate
> a special case, then this may be a strong reason to do the same in the
> IETF YANG data model.

Any data model based on FORTRAN certainly will do.
Most other data modeling languages by now should have nullable/optional/Maybe types.

Going from the actual data type, uint16, to int32, just to accommodate the “not present” case, strikes me as a mistake.
(Which doesn’t mean that you may not want to do this in an implementation, after having validated the input data.)

Grüße, Carsten