public void InteropSemWebGraphSource()
{
Graph g = new Graph();
//FileLoader.Load(g, "InferenceTest.ttl");
GraphSource source = new GraphSource(g);
Console.WriteLine("Reading the input using SemWeb");
N3Reader reader = new N3Reader("InferenceTest.ttl");
reader.Select(source);
Console.WriteLine();
Console.WriteLine("Outputting all Triples using N3Writer");
N3Writer writer = new N3Writer(Console.Out);
source.Select(writer);
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Outputting all Triples of the form ?s rdf:type ?type");
Statement template = new Statement(new Variable(), new Entity(RdfSpecsHelper.RdfType), new Variable());
source.Select(template, writer);
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Outputting all Triples of the form ?s rdf:type ?car");
template = new Statement(new Variable(), new Entity(RdfSpecsHelper.RdfType), new Entity("http://example.org/vehicles/Car"));
source.Select(template, writer);
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Outputting all Triples for Cars and Planes");
SelectFilter filter = new SelectFilter();
filter.Predicates = new Entity[] { new Entity(RdfSpecsHelper.RdfType) };
filter.Objects = new Entity[] { new Entity("http://example.org/vehicles/Car"), new Entity("http://example.org/vehicles/Plane") };
source.Select(filter, writer);
Console.WriteLine();
Console.WriteLine();
writer.Close();
}
public void InteropSemWebGraphQuery()
{
Graph g = new Graph();
FileLoader.Load(g, "InferenceTest.ttl");
GraphSource source = new GraphSource(g);
Console.WriteLine("Query for Cars and their Speeds");
Console.WriteLine();
SemWeb.Query.SparqlXmlQuerySink sink = new SemWeb.Query.SparqlXmlQuerySink(Console.Out);
Variable car = new Variable("car");
Statement[] graphPattern = new Statement[]
{
new Statement(car, new Entity(RdfSpecsHelper.RdfType), new Entity("http://example.org/vehicles/Car")),
new Statement(car, new Entity("http://example.org/vehicles/Speed"), new Variable("speed"))
};
source.Query(graphPattern, new SemWeb.Query.QueryOptions(), sink);
Console.WriteLine("Query for the 1st Car and it's Speed");
Console.WriteLine();
sink = new SemWeb.Query.SparqlXmlQuerySink(Console.Out);
graphPattern = new Statement[]
{
new Statement(car, new Entity(RdfSpecsHelper.RdfType), new Entity("http://example.org/vehicles/Car")),
new Statement(car, new Entity("http://example.org/vehicles/Speed"), new Variable("speed"))
};
SemWeb.Query.QueryOptions options = new SemWeb.Query.QueryOptions();
options.Limit = 1;
source.Query(graphPattern, options, sink);
}
