Re: [sipcore] AD Evaluation of draft-ietf-sipcore-content-id-05 - PULL REQUEST

[Paul Kyzivat <[e-mail]>]

On 5/31/17 4:02 PM, Ben Campbell wrote:

> It’s kind of hard to define extra-message references later if the initial version does not require global uniqueness. If people want to leave that option open, then global uniqueness may still make sense now. I’m okay with it either way as long as the WG has thought it through, and hasn’t just picked it arbitrarily.

I'm struggling to conceive of what extra-message references would 
*mean*. Under what circumstances would that make sense? I guess one 
might make some sort of case for reference to body parts from other 
messages in the same dialog. But doing that would require that the state 
to be referenced be retained - hence expanding the dialog state model.

It would also then raise a whole host of new issues regarding how those 
references might/might not work through B2BUAs.

Imagining some meaning beyond a dialog is even more fanciful. It would 
require an even more expansive expansion of state models.

I don't think we should go there.

	Thanks,
	Paul