I want to do a nested query towards dbpedia with a select expression in the results part. This works well when I use the dbpedia online query service, but will not work with jena. But jena's parser called in QueryFactory.create() does not seem to like SELECT in the results part.
A simplified version of the query I build and try to send is: PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX foaf: <http://xmlns.com/foaf/0.1/> PREFIX : <http://dbpedia.org/resource/> PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> PREFIX dbpediaont: <http://dbpedia.org/ontology/> SELECT distinct ?y ((SELECT count(*) WHERE {?y ?r1 ?z}) as ?c1) ?c3 ?label WHERE {{SELECT ?y (count(?r3) as ?c3) ?label WHERE { <http://dbpedia.org/resource/Simpson,_Milton_Keynes> ?r3 ?y . ?y rdfs:label ?label. FILTER (lang(?label) = "en")}}} Adds Java code (this has nothing to do with it I believe, as I have tried all variants of syntaxes in the parameter list of the QueryFactory.create()): ... String dbpediaEndpointUri = "http://dbpedia.org/sparql";; // Builds query. Query query = QueryFactory.create(buildQuery(lt.getSubject()),Syntax.syntaxSPARQL); QueryExecution qe = QueryExecutionFactory.sparqlService( dbpediaEndpointUri, query, "http://dbpedia.org";); ResultSet resSet = qe.execSelect(); According to what I have read, this should be allowed in SPARQL 1.1 and in ARQ, so what is the problem. Doesn't jena support the full language? The error message I get is (which is exactly the same as for the larger query asking for some more data): Exception in thread "main" com.hp.hpl.jena.query.QueryParseException: Encountered " "select" "SELECT "" at line 7, column 11. Was expecting one of: <IRIref> ... <PNAME_NS> ... <PNAME_LN> ... <VAR1> ... <VAR2> ... "exists" ... "not" ... etc.... Bjørnar Tessem
