Re: INFO Discussion

Dean Willis <[email protected]>
Newsgroups gmane.ietf.sip
Message-ID <[email protected]>
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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