On 3/25/12 1:50 PM, David Wood wrote:
+1. I quite like the registration of the "isDefinedBy" relation as a complement to POWDER's
"describedby", although I'd probably name it in the same way for consistency
("definedby").
There is an inverse of rdfs:isDefinedBy [1].
Here's some easy to read SPASQL (SPARQL + SQL) showcasing the use of rdfs:isDefinedBy, wdrs:describedby etc..
INSERT INTO <http://www.semanticdesktop.org/ontologies/2007/03/22/nco/>{?s rdfs:isDefinedBy <http://www.semanticdesktop.org/ontologies/2007/03/22/nco#> . <http://www.semanticdesktop.org/ontologies/2007/03/22/nco#> <http://open.vocab.org/terms/defines> ?s.
<http://www.semanticdesktop.org/ontologies/2007/03/22/nco#> a owl:Ontology .?s <http://www.w3.org/2007/05/powder-s#describedby> <http://www.semanticdesktop.org/ontologies/2007/03/22/nco/>}
FROM <http://www.semanticdesktop.org/ontologies/2007/03/22/nco/>WHERE { optional {?s rdfs:subClassOf ?o}. optional {?s rdfs:subPropertyOf ?o}. optional {?s owl:equivalentClass ?o}. optional {?s owl:equivalentProperty ?o}. optional {?s a ?o}} .
Links: 1. http://open.vocab.org/docs/defines2. http://uriburner.com/describe/?url=http%3A%2F%2Fwww.semanticdesktop.org%2Fontologies%2F2007%2F03%2F22%2Fnco%23 -- net effect of the SPASQL above i.e., a readable document that describes a specific ontology
3. http://uriburner.com/describe/?url=http%3A%2F%2Fwww.semanticdesktop.org%2Fontologies%2F2007%2F03%2F22%2Fnco%23Contact -- a specific snippet.
Note re. sample pages 1&2, click on the @href of the "About:.." text and you end up in the data space from which the URI in question originates.
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