Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-sdp-01
"James M. Polk" <jmpolk@cisco.com> Wed, 28 March 2012 07:58 UTC
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Date: Wed, 28 Mar 2012 02:58:49 -0500
To: "Paul E. Jones" <paulej@packetizer.com>, 'Paul Kyzivat' <pkyzivat@alum.mit.edu>, 'IETF MMUSIC WG' <mmusic@ietf.org>
From: "James M. Polk" <jmpolk@cisco.com>
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References: <4F704B52.4010801@alum.mit.edu> <00d001cd0c3a$609311e0$21b935a0$@packetizer.com>
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Subject: Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-sdp-01
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At 11:55 AM 3/27/2012, Paul E. Jones wrote: >Paul, > >The previous draft had it that way (somewhat). We had "admitted" and >"non-admitted" at the end. However, it was suggested that we group related >things together. So, for indicating "admitted" or "non-admitted" or "none", >we defined the "admission qualifier" (aq). There may be other adjective >groups that we might define in the future (or now if people can think of >useful examples). > >As one perhaps less useful example might be to indicate the resolution of a >video. So, there might be a "res:1080|720|360" or "res:high|medium|low". to further beat this horse (made along the previous note) is this, just having a adjective as "low" doesn't mean much to anyone, and is limiting future traffic classes to not being able to use "low" with a different meaning. "res:low" (or your suggestion of a "res-low") gives context to the adjective. James >One benefit in defining groups of adjectives is that if you are looking for >the admission qualifier value, for example, then you can find the >"aq:<whatever>" adjective. You may not know what "<whatever>" means, but at >least you can identify that it is the admission qualifier value. > >So, it's there just to provide a grouping construct and to allow for >identification of the group, even if the value in the group is not >recognized. > >Paul > > > -----Original Message----- > > From: mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] On Behalf > > Of Paul Kyzivat > > Sent: Monday, March 26, 2012 6:56 AM > > To: IETF MMUSIC WG > > Subject: Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-sdp-01 > > > > James, > > > > We've had other discussions on "immersive". This is other stuff I had that > > didn't seem worth bringing up in the meeting: > > > > In section 3, the way qualified-adjective is defined, the values for q- > > adjective ("admitted", ...) can be used not only with "aq" (e.g. > > aq:admitted), but can also be used with any other extension-mech that > > might later be defined. > > > > That is ok if it is your intent. Is it? > > > > I'm not at all clear what the distinction is between qualifed and > > unqualified adjectives. I suspect you could get the effect you want by > > discarding the distinction between qualified and unqualified adjectives, > > and simply defining "aq-admitted", "aq-non-admitted", and "aq-none" as > > adjectives. > > > > Thanks, > > Paul > > _______________________________________________ > > mmusic mailing list > > mmusic@ietf.org > > https://www.ietf.org/mailman/listinfo/mmusic > >_______________________________________________ >mmusic mailing list >mmusic@ietf.org >https://www.ietf.org/mailman/listinfo/mmusic
- Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-… Paul E. Jones
- Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-… Paul Kyzivat
- Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-… James M. Polk
- Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-… James M. Polk
- Re: [MMUSIC] draft-ietf-mmusic-traffic-class-for-… James M. Polk