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

Return-Path: <j.schoenwaelder@jacobs-university.de>
X-Original-To: netmod@ietfa.amsl.com
Delivered-To: netmod@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D210B130DFC for <netmod@ietfa.amsl.com>; Fri, 23 Nov 2018 01:38:20 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Level:
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yo59nI2q7Jjj for <netmod@ietfa.amsl.com>; Fri, 23 Nov 2018 01:38:18 -0800 (PST)
Received: from atlas5.jacobs-university.de (atlas5.jacobs-university.de [212.201.44.20]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C03A312896A for <netmod@ietf.org>; Fri, 23 Nov 2018 01:38:17 -0800 (PST)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222]) by atlas5.jacobs-university.de (Postfix) with ESMTP id 3EF08E22; Fri, 23 Nov 2018 10:38:15 +0100 (CET)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from atlas5.jacobs-university.de ([10.70.0.217]) by localhost (demetrius5.jacobs-university.de [10.70.0.222]) (amavisd-new, port 10032) with ESMTP id u0qOCkDSyR-E; Fri, 23 Nov 2018 10:38:15 +0100 (CET)
Received: from hermes.jacobs-university.de (hermes.jacobs-university.de [212.201.44.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hermes.jacobs-university.de", Issuer "Jacobs University CA - G01" (verified OK)) by atlas5.jacobs-university.de (Postfix) with ESMTPS; Fri, 23 Nov 2018 10:38:15 +0100 (CET)
Received: from localhost (demetrius4.jacobs-university.de [212.201.44.49]) by hermes.jacobs-university.de (Postfix) with ESMTP id 294BD2003C; Fri, 23 Nov 2018 10:38:15 +0100 (CET)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from hermes.jacobs-university.de ([212.201.44.23]) by localhost (demetrius4.jacobs-university.de [212.201.44.32]) (amavisd-new, port 10024) with ESMTP id cv8f5KiCcHXp; Fri, 23 Nov 2018 10:38:14 +0100 (CET)
Received: from exchange.jacobs-university.de (sxchmb03.jacobs.jacobs-university.de [10.70.0.155]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "exchange.jacobs-university.de", Issuer "DFN-Verein Global Issuing CA" (verified OK)) by hermes.jacobs-university.de (Postfix) with ESMTPS id 95AD520037; Fri, 23 Nov 2018 10:38:14 +0100 (CET)
Received: from anna.localdomain (10.50.218.117) by sxchmb03.jacobs.jacobs-university.de (10.70.0.155) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.1591.10; Fri, 23 Nov 2018 10:38:14 +0100
Received: by anna.localdomain (Postfix, from userid 501) id E26CA300449A97; Fri, 23 Nov 2018 10:38:13 +0100 (CET)
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>
Reply-To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
Mail-Followup-To: Martin Bjorklund <mbj@tail-f.com>, netmod@ietf.org
References: <87wop5kzgb.fsf@nic.cz> <20181122.143948.1543843065251732639.mbj@tail-f.com> <CABCOCHS18StYKGC4f7cPWFraKNHRsC9cWfrmfZ0j773awdicvQ@mail.gmail.com> <20181122.150027.823800945772964674.mbj@tail-f.com> <20181122163046.bkzck2bmbrf3fzm7@anna.jacobs.jacobs-university.de> <87tvk85et8.fsf@nic.cz>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <87tvk85et8.fsf@nic.cz>
User-Agent: NeoMutt/20180716
X-ClientProxiedBy: SXCHMB04.jacobs.jacobs-university.de (10.70.0.156) To sxchmb03.jacobs.jacobs-university.de (10.70.0.155)
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/A_uhtfbFW07rn-oMWbz3fUiwJHY>
Subject: Re: [netmod] Adding a pre-existing leaf into a new 'choice' - NBC change?
X-BeenThere: netmod@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: NETMOD WG list <netmod.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netmod>, <mailto:netmod-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netmod/>
List-Post: <mailto:netmod@ietf.org>
List-Help: <mailto:netmod-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netmod>, <mailto:netmod-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 23 Nov 2018 09:38:21 -0000

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/>