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using System;
using SemWeb;
public class Select {
const string RDF = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
const string FOAF = "http://xmlns.com/foaf/0.1/";
const string example_foaf_file = "http://rdfweb.org/people/danbri/rdfweb/danbri-foaf.rdf";
static readonly Entity rdftype = RDF+"type";
static readonly Entity foafPerson = FOAF+"Person";
static readonly Entity foafknows = FOAF+"knows";
static readonly Entity foafname = FOAF+"name";
public static void Main() {
Store store = new MemoryStore();
store.Import(RdfReader.LoadFromUri(new Uri(example_foaf_file)));
// Dump out the data, for fun
using (RdfWriter writer = new RdfXmlWriter(Console.Out)) {
writer.Write(store);
}
Console.WriteLine("These are the people in the file:");
foreach (Statement s in store.Select(new Statement(null, rdftype, foafPerson))) {
foreach (Resource r in store.SelectObjects(s.Subject, foafname))
Console.WriteLine(r);
}
Console.WriteLine();
Console.WriteLine("And here's RDF/XML just for some of the file:");
using (RdfWriter w = new RdfXmlWriter(Console.Out)) {
store.Select(new Statement(null, foafname, null), w);
store.Select(new Statement(null, foafknows, null), w);
}
Console.WriteLine();
}
}
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