- From: Graham Klyne <Graham.Klyne@Baltimore.com>
- Date: Sat, 26 May 2001 07:02:19 +0100
- To: Aaron Swartz <aswartz@upclink.com>
- Cc: <w3c-rdfcore-wg@w3.org>
At 05:11 PM 5/25/01 -0500, Aaron Swartz wrote: >Graham Klyne <Graham.Klyne@Baltimore.com> wrote: > > > (6) quotation has also been mentioned (but I think this is wrong... see > below) > >Below, you do not seem to answer this. What about the example (used in EARL >and other apps) that: > > John said "I like fish." > >This feature should not go away. You're right, on both counts: I didn't address it, and the issue you cite won't go away. Below is an excerpt from an off-list message I sent to Frank, which does address the issue: --- The other point which the logicians seem to object to is the idea of reification as "quotation", which brings statements in the RDF "language" into RDF's domain of discourse. This requires a whole mechanism of "reflexion" -- an ability for RDF to interpret its own statements -- which is claimed by some to be an unnecessarily exotic (difficult?) logical concept to achieve what is required. (See, for example, the exchange between Pat Hayes and myself: http://lists.w3.org/Archives/Public/www-rdf-logic/2001May/0056.html http://lists.w3.org/Archives/Public/www-rdf-logic/2001May/0071.html http://lists.w3.org/Archives/Public/www-rdf-logic/2001May/0120.html I'm not sure if the fact that Pat didn't reply further to this means that he found no further point of disagreement, or simply didn't want to continue the debate. But to me, the difference between using a resource to denote the interpretation of an RDF statement in the domain of discourse, as opposed to quoting the statement itself, seems to be exactly the point he was making.) This also relates to the idea that, in simple quotation, quantification doesn't apply to variables within the quoted expression. Drew McDermott makes this point repeatedly, most recently at: http://lists.w3.org/Archives/Public/www-rdf-logic/2001May/0312.html This posting also hints at "a different form of reification" that is not simple quotation. --- My entire message is available at http://lists.w3.org/Archives/Member/w3c-archive/2001May/0016.html. (I didn't post it to this list at that time, because it contains much personal interpretation and I thought it might add more confusion at a point when the goal seemed to try and draw issues into focus.) #g ------------------------------------------------------------ Graham Klyne Baltimore Technologies Strategic Research Content Security Group <Graham.Klyne@Baltimore.com> <http://www.mimesweeper.com> <http://www.baltimore.com> ------------------------------------------------------------
Received on Saturday, 26 May 2001 03:43:54 UTC