- From: pat hayes <phayes@ai.uwf.edu>
- Date: Thu, 21 Nov 2002 11:19:30 -0600
- To: "Jonathan Borden" <jonathan@openhealth.org>
- Cc: www-webont-wg@w3.org
>pat hayes wrote: > >> >That is to say: an OWL document is an RDF document which is interpreted >> >according to the OWL semantics. >> >> Well, OK, but look: suppose I have a doc which contains nothing but >> RDF but the RDF uses terms that are defined in an OWL doc somewhere, >> and I want to know what media type I should say it has. Seems to me >> that with your scheme, it doesn't matter which I use. So why do we >> have the distinction? Whereas if we just say, xml means it looks >> like XML, rdf means it looks like RDF, and owl means it looks like >> OWL, then we are giving some useful syntactic information to a parser >> which might need to know it. >> >> Pat > >hmmm, since RDF/XML is XML, then RDF looks like XML hence is XML. >ditto for OWL Spoken by a true XML loyalist. Of course the are all XML. They are also all unicode character strings. But if I'm an OWL engine looking for OWL-expressed content, then I would like to be able to find out if its worth looking through this piece of XML or not. Similarly for RDF engines. > >and since OWL is RDF/XML and hence looks like RDF, then OWL is RDF >and since Dan says that all RDF is OWL, then RDF is OWL ... > >so what does what something looks like tell me? > >I guess the first question is: > >How do I tell whether something is RDF or OWL? Does this distinction make >sense? All OWL is RDF, but an OWL engine might expect to have to do something extra to some OWL/RDF which it doesn't need to do to non-OWL RDF. Like, for example, parse it into OWL. >and the second: > >How do I know when to apply simple RDF entailments vs. RDF Schema >entailments vs. OWL DL entailments vs. OWL Full entailments to a particular >RDF/XML document? > >Answer these questions and I can tell you what an OWL document is, and if an >OWL document is different than an RDF document. Seems to me that being a document type is one thing, what logic I decide to use on it is another. Pat -- --------------------------------------------------------------------- IHMC (850)434 8903 home 40 South Alcaniz St. (850)202 4416 office Pensacola (850)202 4440 fax FL 32501 (850)291 0667 cell phayes@ai.uwf.edu http://www.coginst.uwf.edu/~phayes s.pam@ai.uwf.edu for spam
Received on Thursday, 21 November 2002 12:19:31 UTC