- From: Richard Smith <richard@ex-parrot.com>
- Date: Thu, 6 Sep 2012 11:45:53 +0100 (BST)
- To: Richard Cyganiak <richard@cyganiak.de>
- cc: Antoine Zimmermann <antoine.zimmermann@emse.fr>, public-rdf-comments@w3.org
Richard Cyganiak wrote: > On 5 Sep 2012, at 14:21, Antoine Zimmermann wrote: > >> Note: the Web Ontology Language [OWL2] offers facilities >> for defining custom datatypes and can be serialised as an >> RDF graph. This makes possible to embed datatype >> definitions in an RDF document. However, processing >> custom datatypes defined this way requires an OWL 2 >> engine. For more details, see Section 9.4 of [OWL2]. >> http://www.w3.org/TR/owl2-syntax/#Datatype_Definitions > > Thanks, not too bad! Here's a slight rewording, does this still sound ok? > > [[ Note: The Web Ontology Language [OWL2] offers > [facilities for formally defining custom > datatypes](http://www.w3.org/TR/owl2-syntax/#Datatype_Definitions) > that can be used with RDF. However, RDF implementations > are not required to support these facilities. ]] I notice neither wording links to 'XML Schema Datatypes in RDF and OWL' <http://www.w3.org/TR/swbp-xsch-datatypes/>. Is that because this document is now considered obsolete? It seems to me that the SWBP note and the OWL2 datatype definition facilities address different somewhat problems, so linking to both would be useful. If you want to use a third-party XML Schema type and don't want to duplicate the definition yourself in OWL2, the techniques in the SWBP note are relevant. Similarly if you want to define a type that's usable in both XML Schema and RDF and don't want to maintain two copies of the declaration. (I dare say at some point someone will write a GRDDL transformation for extracting OWL2 datatype declarations from XML Schema, and link that from the XML Schema namespace document [i.e. the XML Schema for XML Schema], much as the GRDDL transformation for extracting RDFa from XHTML has been linked from XHTML namespace document. That would automatically make OWL2 type definitions available for any simpleType in any XML Schema, and seems to fit quite nicely with how things are done elsewhere.) Richard
Received on Thursday, 6 September 2012 10:45:24 UTC