-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


>  -----Original Message-----
>  From: Paul Prescod [mailto:paul@[...].net] 
>  Sent: 07 June 2002 18:14
>  To: xml-dev@[...].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 
>  "hyperlinking."

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.

Noted. 

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

-----BEGIN PGP SIGNATURE-----
Version: PGP 7.0.4

iQA/AwUBPQDxbOaWiFwg2CH4EQJo4QCaA+wdDBifsfnlYI7NlNbkd82obRsAoIL4
rRyTMm/2mad/hB8noagZ7a83
=qH8G
-----END PGP SIGNATURE-----


-----------------------------------------------------------------
The xml-dev list is sponsored by XML.org <http://www.xml.org> , an
initiative of OASIS <http://www.oasis-open.org> 

The list archives are at http://lists.xml.org/archives/xml-dev/

To subscribe or unsubscribe from this list use the subscription
manager: <http://lists.xml.org/ob/adm.pl>