[Standards] vCard4: IQ vs. PEP

Kevin Smith kevin at kismith.co.uk
Thu Apr 7 06:50:31 UTC 2011


On Thu, Apr 7, 2011 at 7:45 AM, Joe Hildebrand <joe.hildebrand at webex.com> wrote:
> On 4/7/11 7:53 AM, "Kevin Smith" <kevin at kismith.co.uk> wrote:
>
>>> We also need to get the "only send me updates sense the last time I was
>>> online at time X (UTC)" extension increased in priority.
>>
>> Oh, right. For that, I think we just want pubsub nodes to expose MAM.
>
> MAM?  Please parse.

Sorry, Matt's new XEP-0136bis spec.

> I was talking about:
>
> <presence>
>  <x xmlns='this is my first presence of this session'
>     time='this was the last time I was online, and I cached all important
> state'/>
> </presence>
>
> This is a hint to PEP implicit subs that they can take the time, back up
> some for clock skew, and only send me things that have changed since.
>
> If it is copied into the presence probes, it can also reduce presence storms
> on brief logouts (i.e. for sessions not using -198) as well as optimize
> SIFT.

Ah. The problem here being that you can't use timestamps as UIDs, right?

/K



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