Re: [Simple] Address and person URIs

[Henning Schulzrinne <hgs at cs.columbia.edu>]

> > I don't think we want to label a human, per se. What we really want 
> > for person to person communications is a place - i.e., "room 527".
>
>
> Well, a place isn't always sufficient. We see this all the time in the 
> movies: "Meet me in the bar of tha Acme Hotel at 7pm on April 1, 2005. 
> I'll have a red carnation in my lapel."

I suspect that one of the desirable properties would be that the person 
doesn't change identifiers just because they changed location. If you 
don't do that, it will get very confusing - is this URI the same person 
at a different location or a completely different person? (Imagine a 
friend finder service that works in physical space.)

There is also the issue that you now have two ways to represent 
"location of a presentity", as a URI or as PIDF-LO, with contact 
information also available as a vCard.

> So we don't need a *globally* unique person identifier. We need a person 
> identifier that is locally unique in the context of the time and 
> location of the intended meeting. And the time is important too.
>
> The time we can deal with. With regular status it is NOW. We can use 
> timed-status to cover some other time.
>
> I don't think location has to be part of the Contact, as long as it is 
> provided as part of the (timed-)status along with the contact.
>
> Coming up with URIs for identifying people locally within a particular 
> time-space region sounds like future research. Sounds like some sort of 
> arbitary predicate would do the trick.

Do you want to define people by a game of twenty questions?

Henning

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