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Re: Subclass of Thing/Resource

From: Pierre-Antoine CHAMPIN <champin@bat710.univ-lyon1.fr>
Date: Thu, 02 Mar 2000 10:18:45 +0100
Message-ID: <38BE31F5.2A2DE8B6@bat710.univ-lyon1.fr>
To: Tim Berners-Lee <timbl@w3.org>, ML RDF-interest <www-rdf-interest@w3c.org>
I'm not sure we have to make explicit the different levels of interpretation of resources.
Anyway, the real entity "behind" the resource is often out of range for the system !
And I think there is no such thing as easy as dereference for URI -
there can be an arbitrary number of interpretation levels.
e.g.

<rdf:Description about="http://www.somewhere.org/index.html">
  <play:protocol> HTTP 1.1       </play:proptocol>
  <play:size>     3 Kb           </play:size>
  <play:mime>     text/html      </play:mime>
  <play:creator>  Pierre-Antoine </play:author>
</rdf:Description>

none of the properties above applies to the same interpretaion of the URI
should we instead write ?

<rdf:Description about="http://www.somewhere.org/index.html">
  <play:protocol> HTTP 1.1 </play:protocol>
  <play:content>
     <rdf:Description about="file://server.somewhere.org/var/httpd/index.html">
       <play:size> 3 Kb </play:size>
       <play:content>
         <rdf:Description about="mime:xxx">
           <play:type> text/html </play:type>
           <play:content>
             <rdf:Description about="abstract-document:yyy>
               <play:creator> Pierre-Antoine </play:creator>
             </rdf:Description>
           </play:content>
         </rdf:Description>
       </play:content>
     </rdf:Description>
  </play:content>
</rdf:Description>

I don't think so.

Sure a web page or an e-mail address IS NOT the correspongin person.
Neither is its employee ID...
Though, could we prevent people using the dublin core properties this way :

<rdf:Description about="http://www.somewhere.org/somedoc">
  <dc:Creator rdf:resource="mailto:John@somewhere.org"/>
  <dc:Creator rdf:resource="http://www.somewhere.org/~Paul/"/>
  <dc:Creator rdf:resource="employee://somewhere.org/12345"/>
</rdf:Description>

I don't think so !

URIs are ambiguous, yes, they have more than one interpretation level, yes.
We can't prevent people from using URI with different interpretations,
so we'll have to use the context to tackle with it.

 this is not a bug, this is a feature  -- IMHO

  Pierre-Antoine


--- Quid quid Latine dictum sit, altum viditur
    Whatever is said in Latin sounds important.
Received on Thursday, 2 March 2000 04:17:26 GMT

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