Hi Diogo, This response is probably too late to be useful (christmas holidays etc), but ...
On 15 Dec 2010, at 18:20, Diogo FC Patrao wrote: > In section 7.7 of the dqr-server documentation (just below > http://www4.wiwiss.fu-berlin.de/bizer/d2rq/spec/#conditional) I read about > additionalProperties that would be added to a mapping. The example is: > > map:PersonsClassMap a d2rq:ClassMap; > d2rq:class :Person; > d2rq:additionalClassDefinitionProperty map:PersonEquivalence. > > map:PersonEquivalence a d2rq:AdditionalProperty; > d2rq:propertyName owl:equivalentClass; > d2rq:propertyValue foaf:Person. > > My question is, if I make such a mapping, both queries should yield the same > results (IN d2r-server as is)? > > SELECT distinct * > { > ?person a :Person > } > > and > > SELECT distinct * > { > ?person a foaf:Person > } No, because D2RQ doesn't do OWL inference. It would generate the owl:equivalentClass triple, but would not infer anything based on it, so you can't query for the inferred triple (xxx a foaf:Person). > If not, what should I do in order to it happens? Try this: map:PersonsClassMap a d2rq:ClassMap; d2rq:class :Person; d2rq:class foaf:Person; You can have multiple d2rq:class values for a class map. (Extending D2RQ so that it does simple inferencing -- class/property hierarchies and equivalence, domain/range -- would be quite easy, but would have a performance penalty and there hasn't been much demand for it.) Best, Richard > > Thanks'' > > > Diogo F.C. Patrão > Manager of Medical Informatics > Biotechnology Laboratory > Hospital A.C. Camargo > http://www.accamargo.org.br/ > ------------------------------------------------------------------------------ > Lotusphere 2011 > Register now for Lotusphere 2011 and learn how > to connect the dots, take your collaborative environment > to the next level, and enter the era of Social Business. > http://p.sf.net/sfu/lotusphere-d2d_______________________________________________ > d2rq-map-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/d2rq-map-devel ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ d2rq-map-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/d2rq-map-devel
