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Re: RDF for unstructured databases, RDF for axiomatic

• To: shelleyp@b... (Shelley Powers)
• Subject: Re: RDF for unstructured databases, RDF for axiomatic
• From: John Cowan <jcowan@r...>
• Date: Mon, 18 Nov 2002 08:55:25 -0500 (EST)
• Cc: tbray@t... (Tim Bray), lists@a..., jonathan@o... (Jonathan Borden), mc@x... (Mike Champion), xml-dev@l...
• In-reply-to: <a05200f05b9fe302fdd4e@[192.168.0.3]> from "Shelley Powers" at Nov 18, 2002 12:11:48 AM

Shelley Powers scripsit:

> How do you handle a RDF stripe? node-arc-node-arc? Do you create a 
> property that's a resource and then define the resource elsewhere? Or 
> do you nest it? Also, how do you handle containers? These aren't 
> RDF/XML constructs -- these are RDF model constructs. They would need 
> to map to your syntax. I'm not sure how to do this, unambiguously 
> from your document.

Actually, neither stripes nor containers are model constructs: both are
reducible to triples and bnodes.

A stripe like:

<rdf:Description rdf:about="20021115clin002.xml">
  <subject>
    <Descriptor>
      <vocab>SNOMED-RT-0203</vocab>
      <code>P0-00000</code>
      <editMode>implicit</editMode>
      <label>Procedure, NOS</label>
    </Descriptor>
  </subject>
</rdf:Description>

is equivalent to:

<RDF:Description rdf:about="20021115clin002.xml">
  <subject resource="#quux"/>
</rdf:Description>
<Descriptor id="quux">
  <vocab>SNOMED-RT-0203</vocab>
  <code>P0-00000</code>
  <editMode>implicit</editMode>
  <label>Procedure, NOS</label>
</Descriptor>

which is in RPV syntax (if I have not goofed):

<R r="20021115clin002.xml">
  <PV p="/namespaces/meta1#subject" v="#quux">
</R>
<R id="quux">
  <PV p="/namespaces/meta1#vocab">SNOMED-RT-0203</PV>
  <PV p="/namespaces/meta1#code">P0-00000</PV>
  <PV p="/namespaces/meta1#editMode">implicit</PV>
  <PV p="/namespaces/meta1#label">Procedure, NOS</PV>
</R>

As for containers, a container is just a bnode with a type property and
a bunch of properties named rdf:_1, rdf:_2, etc.  The rdf:li is just
syntactic sugar.

-- 
Not to perambulate              || John Cowan <jcowan@r...>
    the corridors               || http://www.reutershealth.com
during the hours of repose      || http://www.ccil.org/~cowan
    in the boots of ascension.  \\ Sign in Austrian ski-resort hotel

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