- From: John Goodwin <John.Goodwin@ordnancesurvey.co.uk>
- Date: Mon, 17 Nov 2008 17:17:25 -0000
- To: "Sean Bechhofer" <sean.bechhofer@manchester.ac.uk>, "Jens Lehmann" <lehmann@informatik.uni-leipzig.de>
- Cc: "Chris Bizer" <chris@bizer.de>, <public-lod@w3.org>, "Semantic Web" <semantic-web@w3.org>, <dbpedia-discussion@lists.sourceforge.net>
> John's comment relates to (at least) the axioms on "publisher": > > [[ > <owl:ObjectProperty rdf:about="http://dbpedia.org/ontology/publisher"> > <rdfs:label xml:lang="en">publisher</rdfs:label> > <rdfs:domain> > <owl:Class> > <owl:unionOf rdf:parseType="Collection"> > <owl:Class rdf:about="Work"/> > <owl:Class rdf:about="Book"/> > <owl:Class rdf:about="Newspaper"/> > </owl:unionOf> > </owl:Class> > </rdfs:domain> > <rdfs:range rdf:resource="http://dbpedia.org/ontology/Person"/> > <rdfs:range rdf:resource="http://dbpedia.org/ontology/Company"/> > </owl:ObjectProperty> > ]] > > The semantics of range mean that you have essentially asserted that > the range of published is [Person and Company]. If you want the > union, you'll have to explicitly use the unionOf constructor here. Thanks Sean, yup that's the one. There were a few other cases of that elsewhere as well. This is also a good example of where (IMHO) the domain was perhaps over specified. For example all sorts of things could have publishers, and not the ones listed here. I worry that if you reuse DBpedia "publisher" elsewhere you could get some undesired inferences. cheers, John . This email is only intended for the person to whom it is addressed and may contain confidential information. If you have received this email in error, please notify the sender and delete this email which must not be copied, distributed or disclosed to any other person. Unless stated otherwise, the contents of this email are personal to the writer and do not represent the official view of Ordnance Survey. Nor can any contract be formed on Ordnance Survey's behalf via email. We reserve the right to monitor emails and attachments without prior notice. Thank you for your cooperation. Ordnance Survey Romsey Road Southampton SO16 4GU Tel: 08456 050505 http://www.ordnancesurvey.co.uk
Received on Monday, 17 November 2008 17:21:46 UTC