Re: [SIPPING] question on draft-johnston-sipping-cc-conferencing-00.txt

Michael Hammer wrote:
> 
> So, back to the key question:  Is there some requirement that ensures that
> a URI will uniquely identify a distinct conference or some other parameter
> that indicates an attempt to create a new conference, allowing a conference
> server to inform the requestor that such an identity is already in use.

Mike,

While I have been asking to have some of the terminology clarified, I think what is currently published already makes it clear that a Conference URI uniquely identifies a particular conference - such that sending an invite to that URI will result in you becoming a participant in the conference.

However that doesn't guarantee that you can tell that a URI you have is a Conference URI. It might instead be (using the terminology I have proposed) a Conference Factory URI, or something else. There is an attempt in draft-johnston-sipping-cc-conferencing-00 to use callerprefs to distinguish these cases, but I think more work is required on that.

If you have a Conference URI, you can give it to all of your friends. Then when they call they will all be in the same conference together. But if you made a mistake and actually had a Conference Factory URI instead, you could still give it to all of your friends, and they could all call it, and each would end up in a conference. But they would each end up in a distinct conference by themself. So it is important to know which kind of URI you have.

	Paul
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