Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-rfc4566bis-32: Media Description

Paul Kyzivat <pkyzivat@alum.mit.edu> Tue, 19 February 2019 15:48 UTC

Return-Path: <pkyzivat@alum.mit.edu>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3DC24130F09; Tue, 19 Feb 2019 07:48:10 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.901
X-Spam-Level:
X-Spam-Status: No, score=-1.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, 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 JxInFxaVjO5x; Tue, 19 Feb 2019 07:48:08 -0800 (PST)
Received: from outgoing-alum.mit.edu (outgoing-alum.mit.edu [18.7.68.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7BC1E130F07; Tue, 19 Feb 2019 07:48:08 -0800 (PST)
Received: from PaulKyzivatsMBP.localdomain (c-24-62-227-142.hsd1.ma.comcast.net [24.62.227.142]) (authenticated bits=0) (User authenticated as pkyzivat@ALUM.MIT.EDU) by outgoing-alum.mit.edu (8.14.7/8.12.4) with ESMTP id x1JFloRL005262 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Tue, 19 Feb 2019 10:47:51 -0500
To: "Roni Even (A)" <roni.even@huawei.com>, Ben Campbell <ben@nostrum.com>, "draft-ietf-mmusic-rfc4566bis.all@ietf.org" <draft-ietf-mmusic-rfc4566bis.all@ietf.org>
Cc: Magnus Westerlund <magnus.westerlund@ericsson.com>, mmusic WG <mmusic@ietf.org>, "'Colin Perkins'" <csp@csperkins.org>
References: <04CAFF8C-B6ED-4B7D-9FDD-ED37DCA2848B@nostrum.com> <e7e0042a-8079-8c0e-0ddd-1ea330f08e7c@alum.mit.edu> <355f8125-87f8-6372-8289-126fa126ccb9@alum.mit.edu> <6E58094ECC8D8344914996DAD28F1CCD18CB5561@dggemm526-mbx.china.huawei.com>
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
Message-ID: <16e3f203-f914-34e6-8383-788231c78914@alum.mit.edu>
Date: Tue, 19 Feb 2019 10:47:50 -0500
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:60.0) Gecko/20100101 Thunderbird/60.5.0
MIME-Version: 1.0
In-Reply-To: <6E58094ECC8D8344914996DAD28F1CCD18CB5561@dggemm526-mbx.china.huawei.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/hAgpmm9AKenCV-BjQzvSzfupNcQ>
Subject: Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-rfc4566bis-32: Media Description
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Multiparty Multimedia Session Control Working Group <mmusic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mmusic>, <mailto:mmusic-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/mmusic/>
List-Post: <mailto:mmusic@ietf.org>
List-Help: <mailto:mmusic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mmusic>, <mailto:mmusic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 19 Feb 2019 15:48:10 -0000

On 2/19/19 1:52 AM, Roni Even (A) wrote:
> Hi Paul,
> I am not sure why we need to  change the definition.
> 
> A media description describes the media and it start with a m= line  ... (and so on)
> 
> If want to expand maybe say that it must start with an m= line and will include the sdp types as listed in section 5

This came up because Ben felt that the current definition was inadequate 
because it is only syntactic. He asked for a semantic definition to be 
added.

IMO the fact that it seems hard to come up with a suitable semantic 
definition makes it more important to do so.

	Thanks,
	Paul