On Nov 16, 2008, at 8:23 PM, Eric Burger wrote:

This is what I've gleaned from the list:

•SIP Option Tags? E.g., sip.extension

There seems to be some confusion between media feature tags, as used in RFV 3840/3841, and SIP option tags.

Option tags are used in Supported and Require, with a common application being in Supported header fields sent in response to OPTIONS messages. They describe which extensions are supported by the UA. I think we need one for INFO packages, because INFO package negotiation is clearly an extension to base INFO.


Feature tags, on the other hand, support selective retargeting in proxies where the potential targets are discovered via REGISTER operations. We may need this too.

--
Dean


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