Corese API

Create a graph:
Graph graph = Graph.create();

Create a graph with RDFS entailment:
Graph graph = Graph.create(true);

Load RDF/S documents:
Load ld = Load.create(graph);
ld.load(“dataset.rdf”);

SPARQL query
QueryProcess exec = QueryProcess.create(graph);
String query = “select * where {?x ?p ?y}”;
Mappings map = exec.query(query);

Query Result
for (Mapping m : map){
IDatatype dt = (IDatatype) map.getValue(“?x”);
dt.intValue();
dt.doubleValue();
dt.booleanValue();
dt.stringValue();
dt.getLabel();
dt.getDatatypeURI();
dt.getLang();
dt.isURI();
dt.isLiteral();
dt.isBlank();
}

Graph result of a construct-where query:
Graph g = exec.getGraph(map);
Graph g = (Graph) map.getGraph();

Command line:
java -cp corese.jar fr.inria.edelweiss.kgtool.Start
-load data.rdf
-query “select * where {?x ?p ?y}”

SPARQL XML or RDF/XML Results
Mappings map = exec.query(query);
ResultFormat f = ResultFormat.create(map);
System.out.println(f);

Turtle Format
Mappings map = exec.query(query);
Graph g = exec.getGraph(map);
TripleFormat f = TripleFormat.create(g);
System.out.println(f);

Turtle Format with named graphs
TripleFormat f = TripleFormat.create(g, true);
System.out.println(f);

Turtle Format with/without selected named graphs
TripleFormat f = TripleFormat.create(g, true);
f.with(“http://example.org/g1”);
f.without(“http://example.org/g2”);
System.out.println(f);

Save graph into a file
TripleFormat f = TripleFormat.create(g, true);
f.write(fileName);

Rule Engine
RuleEngine engine = RuleEngine.create(graph);
RuleLoad ld = RuleLoad.create(engine);
ld.load(“rule.rul”);
engine.process();

OWL RL
RuleEngine engine = RuleEngine.create(graph);
engine.setProfile(RuleEngine.OWL_RL);
engine.process();

Query Engine
QueryEngine engine = QueryEngine.create(graph);
QueryLoad ld = QueryLoad.create(engine);
ld.load(“q1.rq”);
ld.load(“q2.rq”);
engine.process();

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