Hi Jonathan,

There's a more substantial issue you raised which I'll cover in a
separate email. I think what you suggest makes sense, but requires a bit
of redesign. What I will do is submit the working version I have ready.
At this point there's quite a backlog of fixes so it makes sense to get
that out now. Then we can address the redesign issue.

ext Jonathan Rosenberg wrote:
>> The entity-tag MUST be unique across all versions of all entities for
>> a resource.
>>
>> I think we should also add "...and event package" just to be clear.
> 
> I'm not sure what that means. You mean, if the same object is delivered
> in multiple event packages? When does that happen?

I mean that entity-tags for presence can collide with entity-tags for
the conference package. I think it makes sense to include the Event
header field as being part of the entity.

>> I think we should also add that the subscriber should never assume
>> that the entity-tags are shared between notification and, say, SIP
>> event publication or HTTP.
> 
> Right, that would be a good clarification.
> 
> The other issue is you need to be clear about what you mean by
> 'resource' in your text above. For example if two SIP URI are different
> but happen to resolve to the same user, is that the same resource and
> would the etags be the same? (I think no).

I have put in quite a bit of text around this, so let's defer this to
when I get the new version out. I think this is now covered, and that
there isn't a problem even if the entity-tags collide for notifications
in subscriptions that were made to a different URI.

<snip />

>> I can add text to the numbered lists of 4.x sections about storing
>> the entity tags. The very last bullets of each of 4.x sections do
>> talk about what the subscriber is to do with the 204. Should there be
>> a sub-section in section 4 that has normative text on these though?
> 
> Yes. Generally the right structure for extensions is something like:
> 
> UA Behavior
> 
>   Sending Requests
> 
> 
>   Processing Responses
> 
> 
> and you are mostly covering the sending of requests.

This is fixed in the upcoming version.

Cheers,
Aki


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