Re: [netmod] Adding a pre-existing leaf into a new 'choice' - NBC change?

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Fri, 23 November 2018 09:38 UTC

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Date: Fri, 23 Nov 2018 10:38:13 +0100
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: Martin Bjorklund <mbj@tail-f.com>, netmod@ietf.org
Message-ID: <20181123093813.gpxrtanbxgadpwih@anna.jacobs.jacobs-university.de>
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Subject: Re: [netmod] Adding a pre-existing leaf into a new 'choice' - NBC change?
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On Fri, Nov 23, 2018 at 10:22:11AM +0100, Ladislav Lhotka wrote:
> Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> writes:
> 
> > On Thu, Nov 22, 2018 at 03:00:27PM +0100, Martin Bjorklund wrote:
> >> Andy Bierman <andy@yumaworks.com> wrote:
> >> > 
> >> > 9.9 <https://tools.ietf.org/html/rfc7950#section-9.9>.  The leafref
> >> > Built-In Type
> >> > 
> >> >    The leafref built-in type is restricted to the value space of some
> >> >    leaf or leaf-list node in the schema tree and optionally further
> >> >    restricted by corresponding instance nodes in the data tree.  The
> >> >    "path" substatement (Section 9.9.2
> >> > <https://tools.ietf.org/html/rfc7950#section-9.9.2>) is used to
> >> > identify the referred
> >> >    leaf or leaf-list node in the schema tree.  The value space of the
> >> >    referring node is the value space of the referred node.
> >> 
> >> Yes, it should be "data tree" in both occurrences.
> >
> > Time for an errata?
> 
> Here is the old discussion thread:
> 
> https://www.ietf.org/mail-archive/web/netmod/current/msg15979.html
> 
> Everything relevant had been extensively discussed in it, and I am
> sceptical that we can come up with anything significantly better - it
> will only be more (or different) hand-waving. The problem is inherent in
> the leafref design introduced in YANG 1.1. It won't go away no matter
> how much we paper over it.
>

So you think the use of 'schema tree' in the text quoted above (is
used to identify the referred leaf or leaf-list node in the schema
tree) is correct??

I do not want to discuss whether you like the design of leafrefs or
not here - at this time we should focus on whether the text is correct
or not given the design we have. So again, you think that 'schema
tree' is correct in the statement?

/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/>