- From: Dan Brickley <danbri@danbri.org>
- Date: Wed, 20 Oct 2010 19:30:04 +0200
- To: Martin Hepp <martin.hepp@ebusiness-unibw.org>
- Cc: public-lod@w3.org
On Thu, Sep 30, 2010 at 9:06 AM, Martin Hepp <martin.hepp@ebusiness-unibw.org> wrote: > Dear all: > > We use rdfs:isDefinedBy in all of our vocabularies (*) for linking between > the conceptual elements and their specification. > > Now, there is a subtle question: > > Let's assume we have an ontology with the main URI > > http://purl.org/vso/ns > > All conceptual elements are defined as hash fragment URIs (URI references), > e.g. > > http://purl.org/vso/ns#Bike > > The ontology itself (the instance of owl:Ontology) has the URI > > http://purl.org/vso/ns# > > <http://purl.org/vso/ns#> a owl:Ontology ; > owl:imports <http://purl.org/goodrelations/v1> ; > dc:title "VSO: The Vehicle Sales Ontology for Semantic Web-based > E-Commerce"@en . > > So we have two URIs for the ontology: > > 1. http://purl.org/vso/ns# for the ontology as an abstract artefact > 2. http://purl.org/vso/ns for the syntactical representation of the ontology > (its serialization) > > Shall the rdfs:isDefinedBy statements refer to #1 or #2 ? > > #1 > vso:Vehicle a owl:Class ; > rdfs:subClassOf gr:ProductOrService ; > rdfs:label "Vehicle (gr:ProductOrService)"@en ; > rdfs:isDefinedBy <http://purl.org/vso/ns#> . <=========== #1 gets my vote... (The isDefinedBy property originally had use cases in mind for situations where the URI of the vocab couldn't be discovered in Webby fashion through dererencing, eg. uuid: or urn: -based identifiers for the terms or vocab). As it turned out, the world learned to live with using http: everywhere, so that particular need faded somewhat :) Dan cheers, Dan > #2 > vso:Vehicle a owl:Class ; > rdfs:subClassOf gr:ProductOrService ; > rdfs:label "Vehicle (gr:ProductOrService)"@en ; > rdfs:isDefinedBy <http://purl.org/vso/ns> . <=========== > > > I had assumed they shall refer to #1, but that caused some debate within our > group ;-) > > Opinions? > > Best > > Martin > > >
Received on Wednesday, 20 October 2010 17:30:38 UTC