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John Cowan wrote:
> That model works well when you are just fetching representations for human
> or machine consumption. When you want to make *assertions*, though, you
> have a problem. Consider http://www.heritage.org/images/shakespeare.jpg .
> Now does that refer to *Shakespeare*, the playwright who was born on
> or about 1564-04-23? Or does it refer to a *picture of Shakespeare*,
> which is in JPEG format and contains 176 by 190 pixels? And if it refers
> to one of them, how does one refer to the other?
Exactly. If you're just surfing, who cares, because your mind will
disambiguate. If you're trying to build a KR system, you have to either
(a) have a built-in way to disambiguate between what the resource "is"
and what it's "about"
(b) use different names.
I prefer (b), and would encourage people to use something like
http://www.heritage.org/Shakespeare for the person and the URI above for
the picture. Not only is this easier to understand, I'm unconvinced
that there's a good universal way to attack the (a) problem, which has
historically been a pretty severe rat-hole. -Tim