Re: [netmod] yang-data-ext issues

Martin Bjorklund <mbj@tail-f.com> Mon, 23 April 2018 19:51 UTC

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Date: Mon, 23 Apr 2018 21:51:10 +0200 (CEST)
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To: j.schoenwaelder@jacobs-university.de
Cc: lhotka@nic.cz, netmod@ietf.org
From: Martin Bjorklund <mbj@tail-f.com>
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Subject: Re: [netmod] yang-data-ext issues
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Hi,

I am not sure what this statement tells us re. the issue in this email
thread.


/martin


Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>; wrote:
> On Sun, Apr 22, 2018 at 02:56:51PM +0200, Ladislav Lhotka wrote:
> 
> > I am much more concerned with some of the post-1.1 features, also
> > because YANG is now being updated in several directions without a
> > clear vision. And another big problem is that YANG extensions are
> > used for these changes, so we will probably end up with several
> > different versions of YANG, although formally everything will be
> > 1.1.
> 
> I tend to agree. Ideally, we would carefully remove things from YANG
> that did not meet the cost/benefit target (e.g., submodules),
> reorganize definitions whenever possible (some NETCONF specific stuff
> in the YANG specification should not be there, XML encoding may be
> factored out) and incorporate new features (like yang-data) after we
> have sufficient _experience_ to know that such new features will be
> useful (which seems to be the case for yang-data).
> 
> Yes, such iterations likely take 2 years at IETF speed but this kind
> of maintenance cost/effort is likely the price to be paied for
> something that is being used at a larger scale.
> 
> Some people will say that the cost of a new language version is high.
> (Well, when we did 1.1, some people said it will never be deployed.)
> Anyway, not bumping the YANG version number but having instead several
> (optional) language extensions is just hiding the version number
> change under the carpet.
> 
> /js
> 
> -- 
> 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/>
> 
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