- From: pat hayes <phayes@ai.uwf.edu>
- Date: Mon, 28 Oct 2002 11:46:28 -0600
- To: Dan Brickley <danbri@w3.org>
- Cc: Charles McCathieNevile <charles@w3.org>, Sandro Hawke <sandro@w3.org>, <www-rdf-interest@w3.org>
>On Sat, 26 Oct 2002, Seth Russell wrote: > >> >> Charles McCathieNevile wrote: >> >> >After all, RDF actually can allow >> >two contradictory statements. >> > >> Oh really? Could you give me an example of two contradictory statements >> using only the RDF vocabulary? > >You can write contradictory claims about the world using RDF. Nothing in >the core RDF specs allows machines to detect the goof, that's all. This all depends on what you mean by 'contradictory'. I would say that you cannot in fact make contradictory claims using RDF since RDF has no way to express negation or opposition. What can happen is that two sources can make claims in RDF which *taken together with a lot of background knowledge* are contradictory; but until that background knowledge is itself put into RDF (or somehow made accessible to an RDF processor), then the claims either aren't in RDF or else aren't contradictory. 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
Received on Monday, 28 October 2002 12:46:40 UTC