Re: [netmod] Choice Case vs Container+When in RFC7950
Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Tue, 02 April 2019 06:05 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 E0A5E120049
for <netmod@ietfa.amsl.com>; Mon, 1 Apr 2019 23:05:26 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5
tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, URIBL_BLOCKED=0.001]
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 KmVJR0v4Q9Jj for <netmod@ietfa.amsl.com>;
Mon, 1 Apr 2019 23:05:23 -0700 (PDT)
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 DF2DF120086
for <netmod@ietf.org>; Mon, 1 Apr 2019 23:05:18 -0700 (PDT)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222])
by atlas5.jacobs-university.de (Postfix) with ESMTP id 44DDEB83;
Tue, 2 Apr 2019 08:05:17 +0200 (CEST)
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 Nf3Knq0-Z4Gi; Tue, 2 Apr 2019 08:05:17 +0200 (CEST)
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;
Tue, 2 Apr 2019 08:05:17 +0200 (CEST)
Received: from localhost (demetrius5.irc-it.jacobs-university.de [10.70.0.222])
by hermes.jacobs-university.de (Postfix) with ESMTP id 2E85C200A8;
Tue, 2 Apr 2019 08:05:17 +0200 (CEST)
X-Virus-Scanned: amavisd-new at jacobs-university.de
Received: from hermes.jacobs-university.de ([212.201.44.23])
by localhost (demetrius5.jacobs-university.de [10.70.0.222]) (amavisd-new,
port 10028)
with ESMTP id BVf4Dj_3mjz5; Tue, 2 Apr 2019 08:05:16 +0200 (CEST)
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 C03E6200A7;
Tue, 2 Apr 2019 08:05:16 +0200 (CEST)
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; Tue, 2 Apr 2019 08:05:15 +0200
Received: by anna.localdomain (Postfix, from userid 501)
id 51FB63007AAA91; Tue, 2 Apr 2019 08:05:13 +0200 (CEST)
Date: Tue, 2 Apr 2019 08:05:13 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: Qin Wu <bill.wu@huawei.com>
CC: "netmod@ietf.org" <netmod@ietf.org>
Message-ID: <20190402060513.7eh5kgnc63gxyu7w@anna.jacobs.jacobs-university.de>
Reply-To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
Mail-Followup-To: Qin Wu <bill.wu@huawei.com>,
"netmod@ietf.org" <netmod@ietf.org>
References: <B8F9A780D330094D99AF023C5877DABAA48CDC7A@nkgeml513-mbx.china.huawei.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <B8F9A780D330094D99AF023C5877DABAA48CDC7A@nkgeml513-mbx.china.huawei.com>
User-Agent: NeoMutt/20180716
X-ClientProxiedBy: SXCHMB03.jacobs.jacobs-university.de (10.70.0.155) To
sxchmb03.jacobs.jacobs-university.de (10.70.0.155)
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/WagQdmE19jdkN85oUWaLCSCwXxI>
Subject: Re: [netmod] Choice Case vs Container+When in RFC7950
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: Tue, 02 Apr 2019 06:05:27 -0000
I prefer choice since a choice says clearly upfront that what follows are N alternatives. With when statements, I have to keep all the when statements in my mind to derive the conclusion that the model defines alternatives. And the transport leaf in your when construction is redundant. /js On Tue, Apr 02, 2019 at 01:13:52AM +0000, Qin Wu wrote: > Hi, Folks: > Choice case seems interchangeable with Container+when, here is the example of Choice case > container system { > description > "Contains various system parameters."; > choice services { > description > "Configure externally available services."; > case ssh { > description > "SSH service-specific configuration."; > // more leafs, containers, and stuff here... > } > case tls { > description > "TLS service-specific configuration."; > // more leafs, containers, and stuff here... > } > } > } > I think it can be replaced with container+when representation as follows: > container system { > description > "Contains various system parameters."; > container services { > description > "Configure externally available services."; > leaf transport { > enum ssh { > description > "ssh"; > } > enum tls { > description > "tls"; > } > } > container "ssh" { > when "../transport=ssh" { > description > "active only when the transport is ssh"; > } > description > "SSH service-specific configuration."; > // more leafs, containers, and stuff here... > } > container "tls" { > when "../transport=tls" { > description > "active only when the transport is tls"; > } > description > "TLS service-specific configuration."; > // more leafs, containers, and stuff here... > } > } > } > However I didn't see any guidance on when to use Choice case or when to use Container+when? > Any thought about this? > > -Qin > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod -- 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/>
- [netmod] Choice Case vs Container+When in RFC7950 Qin Wu
- Re: [netmod] Choice Case vs Container+When in RFC… Juergen Schoenwaelder