- From: Pat Hayes <phayes@ihmc.us>
- Date: Thu, 27 Oct 2005 15:14:07 -0500
- To: Valentina Presutti <presutti@cs.unibo.it>
- Cc: public-swbp-wg@w3.org
>Dear all, > >here the pointer to our preliminary >draft: <http://tesi.fabio.web.cs.unibo.it/RDFTM/RDFTMInteroperabilityGuidelines>http://tesi.fabio.web.cs.unibo.it/RDFTM/RDFTMInteroperabilityGuidelines >At the moment we worked out the "informal" description of the rules. If I might make a suggestion, it is usually less work in the long run to work out the formal mappings first, and then make sure that the informal account follows the mathematics. Informal rules made without paying attention to the underlying foundations are almost never correct. >Unfortunately we did not address all the issues >but it is very important for the TF to have your >opinion about the approach taken and the >structure of the document. A first quick look prompts the following immediate comment. The translation from RDFS to TM is defined in such a way that it depends on information which may not be available, in particular whether a resource is a member of the class rdftm:InformationResource. What is the intended translation technique to be used when membership in this class is unknown (as it will often be, presumably)? A related point, the document gives as an RDFTM 'rule', "If the resource is not an instance of rdftm:InformationResource, the resource becomes a subject locator..." How is it possible to determine in RDFS that a resource is NOT an instance of a class? Such information can be expressed in OWL, but not in RDFS. It is not valid to infer non-membership in a class from a failure to prove membership in that class. The translation rule as stated seems therefore to be inapplicable to RDFS-to-TM translation, or ill-defined, or possibly both. I will send other comments later when I have had time to study the document more carefully, but these points seem central and require immediate attention. Pat Hayes > >We are still adding contents, so it's likely >we'll have few more elements to discuss about >during the f2f. > >Many thanks for your help. > >Regards, >Valentina > > >----------------------------------------------------------- > >Valentina Presutti > > >Phd Student of Computer Science > >Department of Computer Science > >University of Bologna > >Mura anteo Zamboni 7 > >Ph. +39 (0)51 20 94871 > >Fax. +39 (0)51 20 94510 > >home page: <http://www.cs.unibo.it/~presutti>http://www.cs.unibo.it/~presutti -- --------------------------------------------------------------------- IHMC (850)434 8903 or (650)494 3973 home 40 South Alcaniz St. (850)202 4416 office Pensacola (850)202 4440 fax FL 32502 (850)291 0667 cell phayesAT-SIGNihmc.us http://www.ihmc.us/users/phayes
Received on Thursday, 27 October 2005 20:14:17 UTC