OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   RE: [xml-dev] Can RDDL and RDF coexist?

[ Lists Home | Date Index | Thread Index ]

Hash: SHA1

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


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

Version: PGP 7.0.4



News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS