Re: [netmod] New I-D Submission: draft-bertz-netmod-commonaugment

Andy Bierman <andy@yumaworks.com> Fri, 10 March 2017 17:08 UTC

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From: Andy Bierman <andy@yumaworks.com>
Date: Fri, 10 Mar 2017 09:08:45 -0800
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To: Ladislav Lhotka <lhotka@nic.cz>
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Subject: Re: [netmod] New I-D Submission: draft-bertz-netmod-commonaugment
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On Fri, Mar 10, 2017 at 6:17 AM, Ladislav Lhotka <lhotka@nic.cz> wrote:

> Lyle Bertz <lyleb551144@gmail.com> writes:
>
> > Understood.
> >
> > Let's discuss at the meeting though.  This was a significant issue in the
> > development of the IETF DMM FPC yang files and our open source project.
>  I
> > am open to this going in the proper direction wherever that is but wanted
> > to bring the issue and a possible solution to the table.
>
> Yes, that's fine. One way to alleviate this problem is to define a
> grouping and then have multiple augments that use this grouping. We used
> this approach in RFC 8022. Would this work for your use cases?
>
>
I agree with Martin that this YANG extension replaces augment-stmt and
therefore will
break tools that conform to RFC 7950.  The extension saves 1 line of YANG
for each
"extra augment" so the benefit for readers and writers seems minimal.



> Lada
>

Andy


>
> >
> > Lyle
> >
> >
> > On Tue, Mar 7, 2017 at 2:43 AM, Ladislav Lhotka <lhotka@nic.cz> wrote:
> >
> >> Hi,
> >>
> >> while the use case is clear, I believe such rather fundamental changes
> >> to YANG cannot be done through extensions because otherwise the value of
> >> YANG as a standard will be lost.
> >>
> >> Lada
> >>
> >> Lyle Bertz <lyleb551144@gmail.com> writes:
> >>
> >> > All,
> >> >
> >> > This is a small submission that allows a single augment statement to
> be
> >> > used to augment multiple schema locations or, at the very least, give
> the
> >> > YANG to language generation tools a hint that the augment is similar
> to
> >> > other augments in the module.
> >> >
> >> > It can be found at
> >> > https://datatracker.ietf.org/doc/draft-bertz-netmod-commonaugment/
> >> >
> >> > It is in direct response to issues that arose writing YANG for the
> IETF
> >> DMM
> >> > FPC specification that can be found at
> >> > https://datatracker.ietf.org/doc/draft-ietf-dmm-fpc-cpdp/
> >> >
> >> > and also in response to issues found wrt yangtools (OpenDaylight) code
> >> > generation of the FPC specification.
> >> >
> >> > Lyle
> >> > _______________________________________________
> >> > netmod mailing list
> >> > netmod@ietf.org
> >> > https://www.ietf.org/mailman/listinfo/netmod
> >>
> >> --
> >> Ladislav Lhotka, CZ.NIC Labs
> >> PGP Key ID: 0xB8F92B08A9F76C67
> >>
>
> --
> Ladislav Lhotka, CZ.NIC Labs
> PGP Key ID: 0xB8F92B08A9F76C67
>
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