Re: [Simple] Address and person URIs

[Paul Kyzivat <pkyzivat at cisco.com>]

Henning Schulzrinne wrote:
> > 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?

Well, it would be easier if everyone just agreed to have a barcode 
branded on their forehead and an RFID chip embedded in them, each 
containing their UN assigned global person UUID.

But I sense a lot of people don't want to be so easily or irrevokably 
identifiable. So weak forms of identification may be all that is 
generally acceptable. (Hence "I'll have a red carnation in my lapel" 
rather than "The SSN on my forehead will be 123-56-7890.")

Unfortunately, this doesn't lend itself well to URIs or URNs, because 
the information isn't Unique.

I think we continue to punt this one for now.

	Paul


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