Hello, For now I'm using Virtuoso Open Source on an Ubuntu and I'm trying to do some Sparql queries over my database. Some are ok but I've an error with this one : PREFIX rdfs: <http://www.w3.org/200/01/rdf-schema#> SPARQL SELECT ?s from <http://iaf-dl> WHERE { ?s rdfs:subClassOf ?o }; I took a look on tutorials but I didn't see examples...Maybe I have read too fast. Can you explain me what happens please? Because if there is an error I don't know what is that error.... Thanks in advance, Best regards Brice Cesbron | Capgemini SUD | Marseille | France Responsable OWL | Tel : +33 4 91 16 57 77 | 90, Chemin du Roy d'Espagne | BP23 | 13275 Marseille cedex 09
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