Re: [netmod] ?==?utf-8?q? mandatory choice with non-presence container case
Michal Vaško <mvasko@cesnet.cz> Mon, 24 June 2019 17:01 UTC
Return-Path: <mvasko@cesnet.cz>
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 AB9E012065B for <netmod@ietfa.amsl.com>; Mon, 24 Jun 2019 10:01:34 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cesnet.cz
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 hFcjdxPIv5Xh for <netmod@ietfa.amsl.com>; Mon, 24 Jun 2019 10:01:32 -0700 (PDT)
Received: from kalendar.cesnet.cz (kalendar.cesnet.cz [78.128.211.34]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C5A4C12065D for <netmod@ietf.org>; Mon, 24 Jun 2019 10:01:31 -0700 (PDT)
Received: by kalendar.cesnet.cz (Postfix, from userid 999) id 863B4601AE; Mon, 24 Jun 2019 19:01:29 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cesnet.cz; s=kalendar; t=1561395689; bh=agw5wBkKkKwEGV/AozMTrXm9GFSy2BbN76gggdPhPRA=; h=In-Reply-To:From:Date:Cc:To:Subject; b=iEcoaFm8kfefk/GtfeuGVwgsi5vm4IS4X9ZBRjKvFwAEccr4pvuVGiQKU+612OOo8 a4Ag+ElfkP2vkgZ9KVT8JszHgzH/SiiyCAO/K4etAaClXkCx4Y56MpRrnEhCJgMZcy vC/LSwoWfNk83Tp1EkhKYn6lTLyVEMIko/BEwCRA=
Content-Type: text/plain; charset="utf-8"
In-Reply-To: <BYAPR11MB263111549D604096368CC2ABB5E00@BYAPR11MB2631.namprd11.prod.outlook.com>
From: Michal Vaško <mvasko@cesnet.cz>
X-Forward: 88.101.100.176
Date: Mon, 24 Jun 2019 19:01:29 +0200
Cc: netmod <netmod@ietf.org>
To: "Rob Wilton (rwilton)" <rwilton@cisco.com>
MIME-Version: 1.0
Message-ID: <7797-5d110200-71-35dfff00@18550405>
User-Agent: SOGoMail 2.3.23
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/53F4LCZX8o-MDGArgEJnEqD-7to>
Subject: Re: [netmod] ?==?utf-8?q? mandatory choice with non-presence container case
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: Mon, 24 Jun 2019 17:01:35 -0000
Hi Rob, I think there is a problem in the RFC because using only allowed steps I got invalid data from initially valid data. That cannot be correct. Regards, Michal On Monday, June 24, 2019 18:52 CEST, "Rob Wilton (rwilton)" <rwilton@cisco.com> wrote: > Hi Michal, > > My thoughts: > > According to 7.5.1: > > In the first style, the container has no meaning of its own, existing > only to contain child nodes. In particular, the presence of the > container node with no child nodes is semantically equivalent to the > absence of the container node. YANG calls this style a "non-presence > container". This is the default style. > > Hence your request (because the NP container does not have any children) is equivalent to: > > <TOP> > <L/> > </TOP> > > which fails the "mandatory" check. > > Thanks, > Rob > > > > -----Original Message----- > > From: netmod <netmod-bounces@ietf.org> On Behalf Of Michal Vaško > > Sent: 24 June 2019 17:39 > > To: netmod <netmod@ietf.org> > > Subject: [netmod] mandatory choice with non-presence container case > > > > Hi, > > I have encountered a situation that I think is not covered by RFC 7950. My > > specific use-case was as follows. > > > > model: > > > > container TOP { > > leaf L { > > type empty; > > } > > choice A { > > mandatory true; > > container C; > > } > > } > > > > data: > > > > <TOP> > > <L/> > > <C/> > > </TOP> > > > > Parsing was successful, but printing these data back to XML produced: > > > > <TOP> > > <L/> > > </TOP> > > > > and parsing this correctly failed with missing mandatory choice. According > > to section 7.5.7 [1], I think the C container could be omitted but the > > whole situation does not seem correct. Thank you for any input. > > > > Regards, > > Michal > > > > [1] https://tools.ietf.org/html/rfc7950#section-7.5.7 > > > > _______________________________________________ > > netmod mailing list > > netmod@ietf.org > > https://www.ietf.org/mailman/listinfo/netmod
- [netmod] mandatory choice with non-presence conta… Michal Vaško
- Re: [netmod] mandatory choice with non-presence c… Rob Wilton (rwilton)
- Re: [netmod] ?==?utf-8?q? mandatory choice with n… Michal Vaško
- Re: [netmod] ?==?utf-8?q? mandatory choice with n… Andy Bierman
- Re: [netmod] ?==?utf-8?q? ?==?utf-8?q? ?= mandato… Michal Vaško
- Re: [netmod] ?==?utf-8?q? mandatory choice with n… Qin Wu
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Kent Watsen
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Ladislav Lhotka
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Martin Bjorklund
- Re: [netmod] ?= mandatory choice with non-presenc… Rob Wilton (rwilton)
- Re: [netmod] ?==?utf-8?q? ?==?utf-8?q? ?= mandato… Michal Vaško
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Ladislav Lhotka
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Martin Bjorklund
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Ladislav Lhotka
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Rob Wilton (rwilton)
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Ladislav Lhotka
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Rob Wilton (rwilton)
- Re: [netmod] ?= ?==?utf-8?q? mandatory choice wit… Christian Hopps