- From: Sean Bechhofer <sean.bechhofer@manchester.ac.uk>
- Date: Fri, 17 Oct 2008 16:54:14 +0100
- To: Michael Schneider <schneid@fzi.de>
- Cc: SWD Working SWD <public-swd-wg@w3.org>
Dear Michael Thank you for your comments [1,ISSUE-136]: """ I'm not clear how to express S12 in OWL, should this be intended. One can use rdfs:Literal as the range, which would also contain all typed literals. One can use xsd:string, which has at least a value space equivalent to the set of plain literals, but this would require to have labels of the form "Hello World!"^^xsd:string. Note: Currently, there is some ongoing work (by the OWL and the RIF working groups) on specifying a new data type "rdf:text", which denotes the set of all internationalized plain tags. But, AFAIU, this datatype will /not/ contain those plain literals having /no/ language tag. Here is some text, which is currently under development (so be careful, it's nothing official): <http://www.w3.org/2007/OWL/wiki/InternationalizedStringSpec>. """ ------------------------------------------------------------- As you point out, there are some constraints in the SKOS data model that we are unable to express in OWL (some of these /may/ be addressed by OWL 2, but in the current SKOS specification we are avoiding reference to work in progress). In such cases, the constraints are expressed in prose in the document. Thus the lack of an OWL version of S12 is rather through /necessity/ than intention. Statements to this effect are made in Section 1.7.1 of the LC draft. Do you feel these are sufficient, or do we need to further elaborate this point? As you point out, in this case it would be possible to approximate the constraint -- this is a choice we have not made here. The Working Group propose to *postpone* this issue, indicating that this may be an area that future groups may wish to return to. Are you willing to live with this? Cheers, Sean Bechhofer Alistair Miles [ISSUE-136] http://www.w3.org/2006/07/SWD/track/issues/136 [1] http://lists.w3.org/Archives/Public/public-swd-wg/2008Sep/0044.html -- Sean Bechhofer School of Computer Science University of Manchester sean.bechhofer@manchester.ac.uk http://www.cs.manchester.ac.uk/people/bechhofer
Received on Friday, 17 October 2008 15:55:32 UTC