- From: Vasiliy Faronov <vfaronov@gmail.com>
- Date: Tue, 20 Jul 2010 17:50:58 +0400
- To: Bob Ferris <zazi@elbklang.net>
- Cc: Linked Data community <public-lod@w3.org>
Bob Ferris wrote: > How can I make sure that the value of my counter concept is of the type > xsd:Integer? I think with the current definition: > > co:count > rdf:type rdf:Property , owl:FunctionalProperty ; > rdfs:comment "Links a counter resource to the actual count"@en ; > rdfs:domain co:Counter ; > rdfs:isDefinedBy co: ; > rdfs:label "has count"@en ; > rdfs:range xsd:integer ; > vs:term_status "stable"@en . > > it works. Hmm. I may be mistaken here, but I think that's a wrong declaration. The range of co:count is not xsd:integer, it's rdfs:Literal. rdfs:Literal is the class, xsd:integer is a datatype (a special feature of the rdfs:Literal class). In other words, you don't write: "99" a xsd:integer . but instead: "99"^^xsd:integer a rdfs:Literal . At least, the FOAF and SIOC ontologies specify rdfs:Literal as the range of datatype properties. Also note that you can't really "make sure" that the value is of the right type, unless people use some kind of RDFS-driven validator, which I guess isn't common. -- Vasiliy Faronov
Received on Tuesday, 20 July 2010 13:51:30 UTC