- From: Pat Hayes <phayes@ai.uwf.edu>
- Date: Wed, 17 Apr 2002 16:40:37 -0500
- To: Graham Klyne <Graham.Klyne@MIMEsweeper.com>
- Cc: w3c-rdfcore-wg@w3.org
>At 04:06 PM 4/16/02 +0300, Patrick Stickler wrote: >> > [GK wanders over to the stake in the ground, and gives it a hard kick, to >>> make sure it's still firmly planted...] >> >>Was it? ;-) >> >>Was the kick to test if was firmly planted, or to ensure >>that it remains firmly planted? > >Keeping an eye on it... > >> >> But we have been asked, to a certain extent, to provide an answer >>>> that extends to the point of obtaining a datatype value unambiguously >>>> and reliably. The present MT does not bring users to that point. >>>> A datatyped literal pairing does -- insofar as it identifies a single >>>> value which is obtainable by an application which groks the datatype >>>> in question. >>> >>> Having an rdfd:range [[or substitute current vocab]] associated with a >>> property tells you nothing about the denotation of an object of that >>> property. I.e. it does nothing to help "obtaining a datatype value >>> unambiguously and reliably". (I found that trying to make it do so leads >>> to contradictions.) >>> >>> All it does is limit the allowable literals at the property's sharp end. >> >>I either don't fully follow you, or disagree (or both ;-) >> >>If RDF Datatyping cannot provide a consistent and unambiguous >>interpretation resulting in a specific datatype value, then >>we're just wasting our time. > >Well, maybe, but as I understand things according to Pat's last proposal: > > Jenny age "10" . > age rdfd:range xsd:integer . > >Tells us _only_ that the thing denoted by the node at the sharp end >of "age" is the 2-character string "10". Which is exactly what you >have in absence of the rdfd:range statement. > >As far as it goes, that's pretty clear and unambiguous. But to >conclude that Jenny's age is defined by the number 10 would be to >draw upon information that is not sanctioned by the graph and its >model theory. Right. In fact, it would strictly speaking be in contradiction to the content of the RDF. Jenny's actual age probably is ten, but Jenny's <ex:age> is *definitely* the string "10" according to this RDF. That is fixed and unambiguous no matter what the datatyping information is, and we should be clear about that. Pat -- --------------------------------------------------------------------- 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
Received on Wednesday, 17 April 2002 17:40:40 UTC