tdb

I am using Jena ARQ to write a SPARQL query against a large ontology being read from Jena TDB in order to find the types associated with concepts based on rdfs label: SELECT DISTINCT ?type WHERE { ?x <http://www.w3.org/2000/01/rdf-schema#label> "aspirin" . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type . } This works pretty well and is actually quite speedy (<1 second). Unfortunately, for some terms, I need to perform this query in a case-insensitive way. For instance, because the label "Tylenol" is in the ontology, but not "tylenol" , the following query comes up empty: SELECT

I'm using Jena TDB for loading an RDF dataset and making SPARQL queries against it. I'm using the following maven dependency: <dependency> <groupId>org.apache.jena</groupId> <artifactId>apache-jena-libs</artifactId> <type>pom</type> <version>3.0.1</version> </dependency> And here's the java code where I'm trying to create a TDB dataset: public void loadDirectory(String outputFile){ Dataset dataset = TDBFactory.createDataset(directoryPath); Model tdb = dataset.getDefaultModel(); FileManager.get().readModel(tdb, outputFile); tdb.close(); dataset.close(); LOG.info("RDF dataset loaded to memory");