Hi Benson What version of Virtuoso is this?
OpenLink have been quite slow to move from their proprietary SPARQL extensions to standardized SPARQL 1.1 syntax. They never supported any property path syntax in the past and have been somewhat reluctant to proceed too fast with implementing new SPARQL 1.1 features arguing that they don't want to give 'standard' features to users that they then have to later remove/alter (which is ironic given their quantity of proprietary extensions) Have you tried checking with OpenLink about which versions (if any) support property paths? Their mailing list for the open source version is [email protected] Rob On Jan 22, 2012, at 10:10 AM, Benson Margulies wrote: > I was asked to do an experiment with Virtuoso. It looks to me as if > ARQ mapped + to (), and then Virtuoso, consistent with its rather old > SPARQL dialect, rejected (). Is there any way to tell ARQ what's what? > Or is this ipso-facto a bug in the Virtuoso Jena driver. > > 2012-01-22 12:58:30,042 > com.basistech.jdd.DocumentDatabaseClientFactory - JDD ping > successful: http://localhost:4460/documentDatabase > Exception in thread "main" com.hp.hpl.jena.shared.JenaException: Can > not create QueryIterator.:virtuoso.jdbc4.VirtuosoException: SQ074: > Line 12: SP030: SPARQL compiler, line 10: syntax error at '(' before > 'rdfs:subPropertyOf' > at virtuoso.jena.driver.VirtuosoQueryEngine.eval(Unknown Source) > at > com.hp.hpl.jena.sparql.engine.QueryEngineBase.evaluate(QueryEngineBase.java:138) > at > com.hp.hpl.jena.sparql.engine.QueryEngineBase.createPlan(QueryEngineBase.java:109) > at > com.hp.hpl.jena.sparql.engine.QueryEngineBase.getPlan(QueryEngineBase.java:97) > at > virtuoso.jena.driver.VirtuosoQueryEngine$VirtQueryEngineFactory.create(Unknown > Source) > at > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.getPlan(QueryExecutionBase.java:266) > at > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.startQueryIterator(QueryExecutionBase.java:243) > at > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execResultSet(QueryExecutionBase.java:248) > at > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execSelect(QueryExecutionBase.java:94) > > > > PREFIX rex: <http://jug.basistech.com/2011/01/rex-entity#> > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > > # retrieve the URI for each defined relationship > SELECT DISTINCT ?r > WHERE { > ?r rdfs:subPropertyOf+ rex:relationship . > }
