Hi Hugh, thanks for your quick answer! So I assume that there is no possibility to execute SPARQL 1.1 standard queries over virtuoso as of now.
IMO, it would be a huge benefit, if you implemented native support of SPARQL 1.1 standard syntax in virtuoso's SPARQL enpoint not just for me. A recent discussion on this topic can also be found here: http://tech.groups.yahoo.com/group/jena-dev/message/46991 As for my use case, I would need at least IRI, MINUS, NOT EXISTS, BIND, and STRDT from SPARQL 1.1 [1] in virtuoso's endpoint. You can find my queries at [2]. Since I have a bunch of them, I want to avoid to reformulate them for the virtuoso endpoint. Thanks, Christian [1] http://www.w3.org/TR/sparql11-query/ [2] http://semwebquality.org/mediawiki/index.php?title=Data_Quality_Monitoring_R eports > -----Ursprüngliche Nachricht----- > Von: Hugh Williams [mailto:hwilli...@openlinksw.com] > Gesendet: Samstag, 12. November 2011 15:02 > An: Christian Fuerber > Cc: virtuoso-users@lists.sourceforge.net > Betreff: Re: [Virtuoso-users] Virtuoso Jena Provider and ARQ keywords > > Hi Christian > > Virtuoso does not support NOT EXIST but does have its own built in > function: > > FILTER (!bif:exists ((select (1) ...))) > > See the following example on usage: > > http://docs.openlinksw.com/virtuoso/rdfsparqlrule.html#rdfsparqlru > leexamples6 > > LET is a Jena specific keyword not support in Virtuoso. The SPARQL 1.1 > standard provides an equivalent called BIND it appears which is not > currently supported in Virtuoso but is scheduled for the next release. > > Best Regards > Hugh Williams > Professional Services > OpenLink Software > Web: http://www.openlinksw.com > Support: http://support.openlinksw.com > Forums: http://boards.openlinksw.com/support > Twitter: http://twitter.com/OpenLink > > On 12 Nov 2011, at 09:42, Christian Fuerber wrote: > > > Dear all, > > > > I am having trouble using certain keywords of Jena ARQ to query virtuoso > > over the Virtuoso Jena Provider. > > > > In particular, my queries require the use of the keywords LET, NOT EXISTS, > > and IRI. > > For example I tried to execute the following Code: > > > > VirtGraph set = new VirtGraph > > ("jdbc:virtuoso://localhost:1111/charset=UTF-8/log_enable=2", "dba", > "dba"); > > Model model = new VirtModel(set); > > > > String queryString = > > "SELECT ?s ?o ?now " + > > " FROM <http://localhost/mediawiki> " + > > " WHERE{" + > > " ?s ?p ?o . " + > > "LET(?now := true)" + > > "}"; > > Query query = > > QueryFactory.create(queryString,Syntax.syntaxARQ); > > QueryExecution vqe = > > VirtuosoQueryExecutionFactory.create(query, model); > > ResultSet results = vqe.execSelect(); > > System.out.print(ResultSetFormatter.asText(results)); > > > > Which returns the following error message: > > > > Exception in thread "main" com.hp.hpl.jena.shared.JenaException: Can not > > create ResultSet.:virtuoso.jdbc3.VirtuosoException: SQ074: Line 12: SP030: > > SPARQL compiler, line 10: syntax error at 'LET' before '(' > > at > virtuoso.jena.driver.VirtuosoQueryExecution.execSelect(Unknown > > Source) > > at > VirtuosoSPARQLExample1.main(VirtuosoSPARQLExample1.java:73) > > > > When I use QueryExecutionFactory instead of > VirtuosoQueryExecutionFactory I > > get the following error message: > > > > Exception in thread "main" com.hp.hpl.jena.shared.JenaException: Can not > > create QueryIterator.:virtuoso.jdbc3.VirtuosoException: SQ074: Line 12: > > SP030: SPARQL compiler, line 10: syntax error at 'LET' before '(' > > at virtuoso.jena.driver.VirtuosoQueryEngine.eval(Unknown Source) > > at > > > com.hp.hpl.jena.sparql.engine.QueryEngineBase.evaluate(QueryEngineBase > .java: > > 124) > > at > > > com.hp.hpl.jena.sparql.engine.QueryEngineBase.createPlan(QueryEngineBa > se.jav > > a:98) > > at > > > com.hp.hpl.jena.sparql.engine.QueryEngineBase.getPlan(QueryEngineBase.j > ava:8 > > 6) > > at > > > virtuoso.jena.driver.VirtuosoQueryEngine$VirtQueryEngineFactory.create(U > nkno > > wn Source) > > at > > > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.getPlan(QueryExecutio > nBase. > > java:266) > > at > > > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.startQueryIterator(Que > ryExe > > cutionBase.java:243) > > at > > > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execResultSet(QueryEx > ecutio > > nBase.java:248) > > at > > > com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execSelect(QueryExecu > tionBa > > se.java:94) > > at > VirtuosoSPARQLExample1.main(VirtuosoSPARQLExample1.java:73) > > > > Simple queries without the use of Jena ARQ specific keywords work fine! > > > > I am using Virtuoso Open Source 6.1.4 and Jena 2.6.2 with ARQ 2.8.3. The > > virt_jena.jar is for Jena 2.6.2 [Build 1.5]. > > > > Thank you for any help! > > > > Christian > > > > ------------------------------------------ > > Dipl.-Kfm. Christian Fürber > > Professur für Allgemeine BWL, insbesondere E-Business > > e-business & web science research group > > Universität der Bundeswehr München > > > > e-mail: c.fuer...@unibw.de > > www: http://www.unibw.de/ebusiness/ > > skype: c.fuerber > > twitter: cfuerber > > > > > > > > ---------------------------------------------------------------------------- -- > > RSA(R) Conference 2012 > > Save $700 by Nov 18 > > Register now > > http://p.sf.net/sfu/rsa-sfdev2dev1 > > _______________________________________________ > > Virtuoso-users mailing list > > Virtuoso-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/virtuoso-users
