/// <summary>
/// Runs the rules inherent in the MyLo schema in N3 format using a static Reasoner
/// </summary>
public void MyLoSchemaReasoner()
{
Graph schema = new Graph();
try
{
FileLoader.Load(schema, @"../../../MyLoSchema.n3");
}
catch (RdfParseException parseEx)
{
Debug.WriteLine("Parser Error - reading MyLoSchema.n3");
Debug.WriteLine(parseEx.Message);
}
catch (RdfException rdfEx)
{
Debug.WriteLine("RDF Error - reading MyLoSchema.n3");
Debug.WriteLine(rdfEx.Message);
}
StaticRdfsReasoner reasoner = new StaticRdfsReasoner();
try
{
reasoner.Initialise(schema);
foreach (IGraph g in _store.Graphs)
{
reasoner.Apply(g);
}
}
catch (Exception rdfEx)
{
Debug.WriteLine("Rules Error - applying RDFS Reasoner");
Debug.WriteLine(rdfEx.Message);
}
}
public HttpResponseMessage InferredGet(string text, double latitude, double longitude)
{
UnionGraph resultsGraph = GetUnionGraph();
Graph outputGraph = new Graph();
//resultsGraph.NamespaceMap.AddNamespace("dbo", new Uri("http://dbpedia.org/ontology/"));
Graph ontology = new Graph();
FileLoader.Load(ontology, System.AppDomain.CurrentDomain.BaseDirectory.ToString() + Constants.Ontology);
StaticRdfsReasoner reasoner = new StaticRdfsReasoner();
reasoner.Initialise(ontology);
reasoner.Apply(resultsGraph, outputGraph);
Collection<BaprLocation> locations = ExtractResults(resultsGraph, GetInferredPlaces(outputGraph));
return Request.CreateResponse(HttpStatusCode.OK, locations);
}
public void SparqlViewAndReasonerInteraction()
{
try
{
TripleStore store = new TripleStore();
SparqlView view = new SparqlView("CONSTRUCT { ?s a ?type } WHERE { ?s a ?type }", store);
view.BaseUri = new Uri("http://example.org/view");
store.Add(view);
Console.WriteLine("SPARQL View Empty");
TestTools.ShowGraph(view);
Console.WriteLine();
//Load a Graph into the Store to cause the SPARQL View to update
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
g.BaseUri = new Uri("http://example.org/data");
store.Add(g);
Thread.Sleep(200);
if (view.Triples.Count == 0) view.UpdateView();
Console.WriteLine("SPARQL View Populated");
TestTools.ShowGraph(view);
Console.WriteLine();
Assert.IsTrue(view.Triples.Count > 0, "View should have updated to contain some Triples");
int lastCount = view.Triples.Count;
//Apply an RDFS reasoner
StaticRdfsReasoner reasoner = new StaticRdfsReasoner();
reasoner.Initialise(g);
store.AddInferenceEngine(reasoner);
Thread.Sleep(200);
if (view.Triples.Count == lastCount) view.UpdateView();
Console.WriteLine("SPARQL View Populated after Reasoner added");
TestTools.ShowGraph(view);
}
catch (RdfQueryException queryEx)
{
TestTools.ReportError("Query Error", queryEx, true);
}
catch (RdfException ex)
{
TestTools.ReportError("Error", ex, true);
}
}