Re: draft-ietf-impp-pres-01

Jon Peterson wrote:
> Some have argued that it could be valuable to have multiple subscriptions
> (concurrently or over time) from the same watcher for the same presentity.
> That seems to be the primary argument.

I don't see how the multiple subscriptions has anything to do with this.
Multiple subscriptions work even if you relax the uniqueness reqt:

I can have a subscriptions like this:

From: Thanos
To: Jon
SubID: 1

From: Thanos
To: Jon
SubID: 2

Now with the strict uniqueness requirement, I could not have:

From: Thanos
To: Mark
SubID: 1

because "1" is not globally unique.

Also I could not even have:

From: Alice
To: Bob
SubID: 1

Now with the relaxed uniqueness requirement, both of those are OK, because
SubID needs to be unique only within the To/From pair.

And again, if some application feels the need to have globally unique
SubIDs, there is nothing that prevents it from doing something like this:

From: Stan
To: Kyle
SubID: 12345678987654321;Stan;Kyle

Thanos
---
Thanos Diacakis
Openwave Systems
[email protected]
+1-303 385 6705





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