IETF Logo Mail Archive

Re: [MMUSIC] Partial Offer/Partial Answer draft

Martin Thomson <martin.thomson@gmail.com> Tue, 15 October 2013 17:53 UTC

Return-Path: <martin.thomson@gmail.com>
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 048F91F0D5C for <mmusic@ietfa.amsl.com>; Tue, 15 Oct 2013 10:53:37 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.48
X-Spam-Level:
X-Spam-Status: No, score=-2.48 tagged_above=-999 required=5 tests=[AWL=0.120, BAYES_00=-2.599, NO_RELAYS=-0.001]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ih3LSr2otD8J for <mmusic@ietfa.amsl.com>; Tue, 15 Oct 2013 10:53:36 -0700 (PDT)
Received: from mail-we0-x22d.google.com (mail-we0-x22d.google.com [IPv6:2a00:1450:400c:c03::22d]) by ietfa.amsl.com (Postfix) with ESMTP id 09B3811E81F3 for <mmusic@ietf.org>; Tue, 15 Oct 2013 10:53:19 -0700 (PDT)
Received: by mail-we0-f173.google.com with SMTP id u57so9024269wes.32 for <mmusic@ietf.org>; Tue, 15 Oct 2013 10:53:19 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=05kr1bn1tSFwHMRo3DMys26ZYwpjezbHnbFc572ztgs=; b=HH+Cgs07K7aRxa+bE6qt5RFgTLl7XaEi0nJFtyfuuj/EJzUXQxz1x9Rjsvw5QAv0tO VRx6Mnjb7oePX3A8O9upHJN2D2542mCdPuPqwqWTGTgrM6HIykYha3HYBhuUEDpT0WA/ B+bTGYabPcSr0M6aV/UbX9u0XzTctXFtoPFYYSpRbtEFaYBm6g4GiJpKoulVtpbbs7FT sSX4h/pJP1muEimHW4U+Kxfwn2Ig+CYGJ56TOofaRUjVO1zIRNOsb25ymEMr2K1s08Uw O4brMXOCpHeFJdsRMfp3kBKBXyeQRu8v86h+0U3+eGSGjb6sb0Wkg+vbzSvPsQKW6XCe 2Nxg==
MIME-Version: 1.0
X-Received: by 10.194.110.138 with SMTP id ia10mr36371080wjb.3.1381859599111; Tue, 15 Oct 2013 10:53:19 -0700 (PDT)
Received: by 10.227.202.194 with HTTP; Tue, 15 Oct 2013 10:53:19 -0700 (PDT)
In-Reply-To: <525D75C8.70607@nostrum.com>
References: <525C7537.4080209@nostrum.com> <CABkgnnV+VihxB1X_KdaG5fAAVfuk2s06fQKApxFHWd_wG8Wksw@mail.gmail.com> <C5BA15C5-34BF-4ACA-B41A-B65927801346@nostrum.com> <CABkgnnV1aXP6LJ6KYsob4TbG2H5o0+4532AxGBA6npGm5DjbNg@mail.gmail.com> <525CB632.3030602@nostrum.com> <CABkgnnWZaNoUjpQ4ZX55iZKS7GgzsvrB_fSTe7d1THHtyFo65Q@mail.gmail.com> <525D75C8.70607@nostrum.com>
Date: Tue, 15 Oct 2013 10:53:19 -0700
Message-ID: <CABkgnnV-wifOnrgv6XNwBdXyL8CeOAkz1A1TeX-3cHkbYxzitw@mail.gmail.com>
From: Martin Thomson <martin.thomson@gmail.com>
To: Adam Roach <adam@nostrum.com>
Content-Type: text/plain; charset="UTF-8"
Cc: "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] Partial Offer/Partial Answer draft
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.12
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: <http://www.ietf.org/mail-archive/web/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, 15 Oct 2013 17:53:37 -0000

On 15 October 2013 10:05, Adam Roach <adam@nostrum.com> wrote:
> True, but this has its own point of brittleness: if a media section is part
> of two groups of the same type, you're back to the issue of not being able
> to clearly indicate which of the groups this rgroup attribute applies to.

This specifically avoids that brittleness - the identifier in the
a=rgroup: is an identifier for the *group*, so if a media section is
part of two groups of the same type, then it's going to get two
different group identifiers.

m=whatever
a=mid:blah
a=rgroup:LS groupA
a=rgroup:LS groupB

Rather than identify one member of a group in order to identify the
group by proxy, it identifies the group directly.  The cost is that
you can't use 5888 any more.

v2.46.0 | Report a Bug | By Email | System Status