- From: Graham Klyne <Graham.Klyne@MIMEsweeper.com>
- Date: Wed, 03 Oct 2001 10:03:37 +0100
- To: Pat Hayes <phayes@ai.uwf.edu>
- Cc: w3c-rdfcore-wg@w3.org
At 07:22 PM 10/2/01 -0500, Pat Hayes wrote: >>Dan, >> >>Good point! >> >>My next question, then, would be: can bNodes denote literal values? >> >>(If we go down this route, I think the answer should be yes.) > >Well, they can now, in fact, since the MT allows literal values to be in >IR. For example, this is perfectly satisfiable, when aaa is a URI: > >aaa rdf:type rdfs:Literal > >and therefore so is > >_:xxx rdf:type rdfs:Literal Sure. My question was an attempt to give consideration to the debate about whether non-disjointness of literal values and resources might create problems for description logics built on RDF. #g >>At 05:56 PM 10/1/01 -0500, Dan Connolly wrote: >>>Graham Klyne wrote: >>>[... lots of stuff that I'd have to re-read in order >>>to comment intelligently on...] >>>> - Does it make sense for literals to have properties; e.g. >>>> "Property string" --length--> "15" >>>> I think any such properties would be trivial, in the sense that they >>>> always >>>> can be determined by examination of the literal itself. So, if >>>> prohibited, >>>> no expressive power is lost. >>> >>>No, now that we've decided that existential quantification >>>is part of RDF, there *is* expressive power in properties >>>of literals (strings, XML content constants, ...): >>> >>>Consider: >>> >>> <http://www.w3.org/> dc:title _:s. >>> _:t charmod:lengthNumeral "15". >>> >>>that's true in interpretations where the/a title of >>>the W3C home page is longer than 15 chars, and >>>false in other interpretations. >>> >>>-- >>>Dan Connolly, W3C http://www.w3.org/People/Connolly/ >> >>------------------------------------------------------------ >>Graham Klyne MIMEsweeper Group >>Strategic Research <http://www.mimesweeper.com> >><Graham.Klyne@MIMEsweeper.com> >>------------------------------------------------------------ > > >-- >--------------------------------------------------------------------- >IHMC (850)434 8903 home >40 South Alcaniz St. (850)202 4416 office >Pensacola, FL 32501 (850)202 4440 fax >phayes@ai.uwf.edu http://www.coginst.uwf.edu/~phayes ------------------------------------------------------------ Graham Klyne MIMEsweeper Group Strategic Research <http://www.mimesweeper.com> <Graham.Klyne@MIMEsweeper.com> ------------------------------------------------------------
Received on Wednesday, 3 October 2001 05:09:35 UTC