[MEDIACTRL] Fw: New MRB document (-04)

Hi, Chris,

This is NOT my understanding of the requirement for SIP option tags (see MARTINI for a counter-example) - the whole point of http://tools.ietf.org/html/rfc5727/, as I understood it, was to allow multiple groups to extend SIP, as long as they used a Standards Action for option tags, and as long as they weren't touching RFC 3261-3265, which is still the domain of SIPCORE.

If the point of this option tag is to say "yeah, we know a lot of SIP implementations don't support MIME multipart/mixed, but we're going to use it", I do think that a note to DISPATCH might be useful, and I'm thinking that the option name should not be tied to the IAMM usage (because it's applicable to other usages), but I think MEDIACTRL can do this. 

Eric, Robert - am I getting this right?

Thanks,

Spencer

----- Original Message ----- 
From: Chris Boulton 
To: mediactrl@ietf.org 
Sent: Wednesday, March 31, 2010 3:14 AM
Subject: Re: [MEDIACTRL] New MRB document (-04)

2) Required/Support header in SIP

Ben also pointed out that a proper piece of information, an option tag, may be needed in the Required/Supported headers for the Consumer-over-SIP case to address the use of multipart/mixed payloads in IAMM. A proper name for the option tag, considering the use case, might be just 'iamm'. Is it acceptable to specify such information in this document (and if so, is there any guideline that should be followed), or is it something that falls instead under the responsibility of other WGs, e.g., SIPCORE?

  [Chris] We had similar issues earlier in the MediaCtrl process that got a bit messy when we started adding stuff to MediaCtrl documents and have taken a wide berth since.  I think we will upset a few people by having it defined in the MRB doc - do the chairs agree in the new world of SIPCORE and DISPATCH?  I suspect to complete we do need an option tag - and I suspect it needs to be submitted to SIPCORE?  Eric/Spencer - thoughts?

Chris.

-- 
Chris Boulton
CTO & Co-founder
NS-Technologies
m: +44.7876.476681

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