[topicmapmail] Meaning of URIs - ongoing debate on new W3C forum

[Jan Algermissen]

Jan Algermissen wrote:

> Thomas, please answer this:
> 
> a) in RDF, what does "http://www.w3.org/index.html" denote?
> 
> b) in TM-land, what does "http://www.w3.org/index.html" denote?


Duh... I actuallymeant to write:


a) in RDF, what does "http://www.w3.org/index.html" identify?

b) in TM-land, what does "http://www.w3.org/index.html" identify?


Sorry about that.


Jan


> Jan
> 
>  True, a subject indicating URI is expected to have
> > some explanatory document at its address, but many RDF people would like
> > to see the same thing for RDF URIs - it is a matter for a lot of discussion.
> >
> > Besides, there is nothing that says you have to dereference a topic map
> > subject indicating URI.
> > If my topic map engine notices the URI matching
> > the PSI for "superclass", for example, it will be unlikely to
> > dereference it - it will just know what it indicates because the
> > programmer built that in.
> >
> > In RDF, you can say things about the "resource" indicated by its URI
> > identifier.  I suppose we could do that in topic maps by creating a
> > topic for a PSI.  Would that work?
> >
> > In other ways, those rdf URIs are like topic id values - as they would
> > appear in a particular xtm instance, for example.  They would be almost
> > identical if we could reference a topic in another map without importing
> > the corresponding map, thereby getting a kind of stable URI value to use
> > as a topic id.
> >
> > Thus rdf uses those URIs as a kind of combination of topic id and PSI.
> > I have not thought much about the implications of this, but it would
> > probably be worth looking at.
> >
> > Cheers,
> >
> > Tom P
> >
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> 
> --
> Jan Algermissen                           http://www.topicmapping.com
> Consultant & Programmer                   http://www.gooseworks.org
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-- 
Jan Algermissen                           http://www.topicmapping.com
Consultant & Programmer	                  http://www.gooseworks.org