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> -----Original Message-----
> From: Paul Prescod [mailto:email@example.com]
> Sent: 07 June 2002 18:14
> To: firstname.lastname@example.org
> Subject: Re: [xml-dev] Can RDDL and RDF coexist?
> Bill de hÓra wrote:
> > You've already moved outside of RDF. RDF doesn't have any
> notion of
> > hyperlinking.
> URIs embedded in XML making assertions about relationships is
URIs are a convenience for creating logical constants in RDF, not
for hyperlinking. Blanket assertions about XML hyperlinking doesn't
make it so in RDF. I note you quoted hyperlinking, a hyperlink here
implies representation retrieval.
> > ... That some RDF constants might have a retrievable RDF
> schema at the
> > end of them is a happy coincidence (unless you're Patrick ;)
> How could that be true for "rdf:About"?
The fact that the URI may also be used retrieve information is a
neat trick, but it is a trick and it is not part of RDF.
> > The thing to do is keep the code that reasons about the
> graph separate
> > from the code that streams information into the graph.
> It doesn't matter how you segment it.
I think it does.
> You haven't answered my question. Some piece of software
> stumbles upon "eg:Document". It doesn't know about
> eg:Document yet. It knows a bunch about eg:Work. eg:Document
> is a subclass of eg:Work, so everything it knows about
> eg:Work should apply to eg:Document. How does it discover the
> subclass relationship? I don't care how you segment it into
> rdf processor and application.
There's no facility in RDF to retrieve such information. Retrieval
is sensibly punted to something can do retrieval, hence I make the
distinction. I did answer your question, but perhaps I didn't make
myself clear. I'll try again: you do whatever you think makes sense
to get the information. That can be called a local convention or a
hack, but whatever you call it, it is beyond RDF's ambit to do so.
Bill de hÓra
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