how to use rdfstore in node.js poroject

[Gaurav Wable]

I am new to node.js.
I want to use rdfstore module for implementing semantic web in a node.js poroject.

I found this sample code on Github for rdfstore, can anyone explain it


var rdfstore = require('rdfstore');

new rdfstore.Store({persistent:true,
                    engine:'mongodb',
                    name:'myappstore', // quads in MongoDB will be stored in a DB named myappstore
                    overwrite:true,    // delete all the data already present in the MongoDB server
                    mongoDomain:'localhost', // location of the MongoDB instance, localhost by default
                    mongoPort:27017 // port where the MongoDB server is running, 27017 by default
                   }, function(store){
    store.execute('LOAD <http://dbpedia.org/resource/Tim_Berners-Lee> INTO GRAPH <http://example.org/people>', function() {

    store.setPrefix('dbp', 'http://dbpedia.org/resource/');

    store.node(store.rdf.resolve('dbp:Tim_Berners-Lee'), "http://example.org/people", function(success, graph)     {

      var peopleGraph = graph.filter(store.rdf.filters.type(store.rdf.resolve("foaf:Person")));

      store.execute('PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\
                     PREFIX foaf: <http://xmlns.com/foaf/0.1/>\
                     PREFIX : <http://example.org/>\
                     SELECT ?s FROM NAMED :people { GRAPH ?g { ?s rdf:type foaf:Person } }',
                     function(success, results) {

                       console.log(peopleGraph.toArray()[0].subject.valueOf() === results[0].s.value);
            console.log('Getting value...');
            console.log(peopleGraph.toArray());

                     });

    });

  });

})