named-graphs

Add just this one quad to an empty store: <http://x.com/s> <http://x.com/p> 2 <http://x.com/g> . Then execute this SPARQL query (taken from per Bob DuCharme's book 'Learning SPARQL', so this must be standard SPARQL for retrieving all quads across the dataset, regardless of implementation, right!?): SELECT ?g ?s ?p ?o WHERE { { ?s ?p ?o } UNION { GRAPH ?g { ?s ?p ?o } } } But Jena and Sesame reply with different answers!!? Here's what I see: Jena Fuseki console on Tomcat 6.0.37 (version 2.10.0 - out-of-the-box, no configuration changes!) - (the correct answer as I understand things): ----------

I am trying to query my newly created TDB database use the tdbquery program. However, I am having a hard time writing a query that targets the correct named graph. I am doing the following: First a create a new dataset and add a name graph called "facts" Dataset dataset = TDBFactory.createDataset("/tdb/"); dataset.begin(ReadWrite.WRITE) ; try { Model facts = RDFDataMgr.loadModel("lineitem.ttl") ; dataset.addNamedModel("facts", facts); dataset.commit(); TDB.sync(dataset); dataset.end(); } finally { dataset.close(); } When I query all graphs in my TDB database it looks fine. ./tdbquery --loc

There is a strange behaviour in the connection of the commandline tools of ARQ, TDB and Named Graphs. If importing data via tdbloader in a named graph it can not be queried via GRAPH clause in a SPARQL SELECT query. However, this query is possible when inserting the data in the same graph with SPARQL INSERT. I have following assembler description file tdb.ttl : @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> . @prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> . [] ja