From nobody Mon Apr 5 05:04:03 2021 Return-Path: X-Original-To: core-parameters@ietfa.amsl.com Delivered-To: core-parameters@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 13EE03A15BE for ; Mon, 5 Apr 2021 05:04:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.82 X-Spam-Level: X-Spam-Status: No, score=-1.82 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_NEUTRAL=0.779, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=messagingengine.com 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 ejye39ykknKV for ; Mon, 5 Apr 2021 05:03:57 -0700 (PDT) Received: from wforward1-smtp.messagingengine.com (wforward1-smtp.messagingengine.com [64.147.123.30]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 654043A15BC for ; Mon, 5 Apr 2021 05:03:56 -0700 (PDT) Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailforward.west.internal (Postfix) with ESMTP id C9CE417A3 for ; Mon, 5 Apr 2021 08:03:54 -0400 (EDT) Received: from imap3 ([10.202.2.53]) by compute2.internal (MEProxy); Mon, 05 Apr 2021 08:03:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=g0y4W/ n0AMRbPBVfyP/oTM0EmL2gZ2BiahEKiANNRxA=; b=YmT/oaS4OZmVdrhWL/lDjn xxOZIeorXFISlTD8FVwdEiEC3TMZvAyNkBma74+EBVnyhcijHwI06m/pyuONXBjq KAnue8pN17NZeKzWkb0imQ2q279JV1Irh8DJr8p6Cm9b4VuMwDzv+xfBtIvtikhg Mh+6eDuXwygXollk3R9UIfcNIz5t1OvszFKNMM3UiZi9js3hkbrbiOq/H2+8dGbU 2pQ35sX28TArQGk2mR8kYtZJtaq+LPbtjfuCOpXufdrzxAMhYQ0aWwMK9CQUfDIJ Vn6M18Ih2IC9ebDMQXmpQ/fsn8qVf6fvZs/aKuzbmGQ/8A0/JmJ5cOSsZemj7hCQ == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrudejvddggeekucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpefofgggkfffhffvufgtgfesthhqre dtreerjeenucfhrhhomheplfgrihhmvggplfhimhornhgviicuoehjrghimhgvsehikhhi rdhfiheqnecuggftrfgrthhtvghrnhephfetfeeuvdefhfeuffegjeejleffueegfefhle ekleejkeetteehteevfedvtdffnecuffhomhgrihhnpehivghtfhdrohhrghenucevlhhu shhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehjrghimhgvsehikh hirdhfih X-ME-Proxy: Received: by mailuser.nyi.internal (Postfix, from userid 501) id 44FBE4200CB; Mon, 5 Apr 2021 08:03:53 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-273-g8500d2492d-fm-20210323.002-g8500d249 Mime-Version: 1.0 Message-Id: <344256de-9aff-4677-ac6f-b214a9e954e1@www.fastmail.com> Date: Mon, 05 Apr 2021 15:03:32 +0300 From: =?UTF-8?Q?Jaime_Jim=C3=A9nez?= To: core-parameters@ietf.org Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable Archived-At: Subject: [core-parameters] Heads up for senml-versions X-BeenThere: core-parameters@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Expert review of CoAP parameters." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Apr 2021 12:04:02 -0000 Dear CoRE parameters experts, this is just a heads up for the draft-core-senml-versions which has now = finished WGLC. Please have a look at the new sub-registry being created = and if you have any issues with the content please let the chairs of CoR= E know. https://tools.ietf.org/html/draft-ietf-core-senml-versions-02#page-4 We intend to submit to IESG shortly, so your potential comments would be= checked during the IESG review process. 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Tue, 6 Apr 2021 07:12:49 -0400 (EDT) Date: Tue, 6 Apr 2021 14:12:44 +0300 From: =?utf-8?Q?Jaime=20Jim=C3=A9nez?= To: Esko Dijk Cc: "core-parameters@ietf.org" Message-ID: <20210406111244.kt7aie744gfaji4r@EMB-T1BQML85> References: <344256de-9aff-4677-ac6f-b214a9e954e1@www.fastmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Archived-At: Subject: Re: [core-parameters] Heads up for senml-versions X-BeenThere: core-parameters@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Expert review of CoAP parameters." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Apr 2021 11:12:56 -0000 Hi Dijk, you actually might have a point there. While we have discussed it during several IETF meetings we might have overlooked that explanation on the draft itself. We hve added several clarifications and I am wondering if @cabo you would be OK with adding that short motivation that Dijk is suggesting. It could for example fit nicely on section 2.1. Ciao! -- Jaime On 06.04.2021 08:13, Esko Dijk wrote: >Hi Jaime, > >As an outsider to SenML I think the reason for doing this particular encoding in the version number is not yet well explained in the draft. Somewhere it should state e.g. "re-purposing the version number is preferred to adding an additional feature-bitmask field in a version-11 format, because shorter to encode in average use cases". > >The registry looks okay from what I can tell! >For the sake of caution it could be useful to already reserve one feature code (e.g. the last one?) to indicate a far-future-version that doesn't encode a particular set of features but leaves open the door towards a completely different format (not using the feature codes) some day. > >Regards >Esko > >-----Original Message----- >From: core-parameters On Behalf Of Jaime Jiménez >Sent: Monday, April 5, 2021 14:04 >To: core-parameters@ietf.org >Subject: [core-parameters] Heads up for senml-versions > >Dear CoRE parameters experts, > >this is just a heads up for the draft-core-senml-versions which has now finished WGLC. Please have a look at the new sub-registry being created and if you have any issues with the content please let the chairs of CoRE know. > >https://tools.ietf.org/html/draft-ietf-core-senml-versions-02#page-4 > >We intend to submit to IESG shortly, so your potential comments would be checked during the IESG review process. > >Ciao! >-- >Jaime Jiménez > >_______________________________________________ >core-parameters mailing list >core-parameters@ietf.org >https://www.ietf.org/mailman/listinfo/core-parameters >_______________________________________________ >core-parameters mailing list >core-parameters@ietf.org >https://www.ietf.org/mailman/listinfo/core-parameters From nobody Wed Apr 7 01:37:13 2021 Return-Path: X-Original-To: core-parameters@ietfa.amsl.com Delivered-To: core-parameters@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 17DC63A1140 for ; Wed, 7 Apr 2021 01:37:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.919 X-Spam-Level: X-Spam-Status: No, score=-1.919 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_BLOCKED=0.001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-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 qCFB3J41q8aN for ; Wed, 7 Apr 2021 01:37:09 -0700 (PDT) Received: from gabriel-vm-2.zfn.uni-bremen.de (gabriel-vm-2.zfn.uni-bremen.de [134.102.50.17]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 038573A1146 for ; Wed, 7 Apr 2021 01:37:08 -0700 (PDT) Received: from [192.168.217.118] (p548dc178.dip0.t-ipconnect.de [84.141.193.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by gabriel-vm-2.zfn.uni-bremen.de (Postfix) with ESMTPSA id 4FFd6n58GkzylF; Wed, 7 Apr 2021 10:37:05 +0200 (CEST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\)) From: Carsten Bormann In-Reply-To: Date: Wed, 7 Apr 2021 10:36:58 +0200 Cc: =?utf-8?Q?Jaime_Jim=C3=A9nez?= , "core-parameters@ietf.org" X-Mao-Original-Outgoing-Id: 639477418.046751-7b97d505b139cba1ea43065f4d9f6c15 Content-Transfer-Encoding: quoted-printable Message-Id: <1F39DA79-D2AC-48B4-8C86-BE3F8233F4AF@tzi.org> References: <344256de-9aff-4677-ac6f-b214a9e954e1@www.fastmail.com> To: Esko Dijk X-Mailer: Apple Mail (2.3608.120.23.2.4) Archived-At: Subject: Re: [core-parameters] Heads up for senml-versions X-BeenThere: core-parameters@ietf.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Expert review of CoAP parameters." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Apr 2021 08:37:12 -0000 Hi Esko, > As an outsider to SenML I think the reason for doing this particular = encoding in the version number is not yet well explained in the draft. = Somewhere it should state e.g. "re-purposing the version number is = preferred to adding an additional feature-bitmask field in a version-11 = format, because shorter to encode in average use cases=E2=80=9D. Re being short as a rationale: See first paragraph of 2.1 (OK, it=E2=80=99= s called =E2=80=9Cefficient=E2=80=9D there). There is an infinite number of other approaches that solve this problem. The specific one you mention really didn=E2=80=99t come to mind as it is = inferior both to the one we chose and the introduction of a separate = must-understand feature bit mask (no need to update the version number = then). I=E2=80=99m not sure we should discuss all these potential alternative = approaches. > The registry looks okay from what I can tell! > For the sake of caution it could be useful to already reserve one = feature code (e.g. the last one?) to indicate a far-future-version that = doesn't encode a particular set of features but leaves open the door = towards a completely different format (not using the feature codes) some = day.=20 Well, we do have must-understand fields, so we can switch some features = over to them whenever we like (possibly earlier than exhaustion of the = version number bits). (See parenthesis in penultimate paragraph of = 2.1., which I think also at least partially covers the previous point.) 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