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AGReasoningSubClassOf.java

package com.franz.ag.examples;



import com.franz.ag.*;



public class AGReasoningSubClassOf {



    /**

     * Demonstrates basic reasoning involving rdfs:subClassOf

     * 

     * @param args unused

     * @throws AllegroGraphException 

     */

    public static void main(String[] args) throws AllegroGraphException {

        // Connect to server, which must already be running.

        AllegroGraphConnection ags = new AllegroGraphConnection();

        try {

            ags.enable();

        } catch (Exception e) {

            throw new AllegroGraphException("Server connection problem", e);

        }

        // Create fresh triple-store for this example.

        AllegroGraph ts = ags.renew("subclassof", AGPaths.TRIPLE_STORES);

        

        // Register your namespaces

        ts.registerNamespace("ex","http://example.org/");

        

        // Add some triples to the store

        ts.addStatement("!ex:A","!rdfs:subClassOf", "!ex:B");

        ts.addStatement("!ex:B","!rdfs:subClassOf", "!ex:C");

        ts.addStatement("!ex:a","!rdf:type", "!ex:A");

        

        // Retrieve some triples without reasoning 

        Cursor cc = ts.getStatements(false,"!ex:A","!rdfs:subClassOf",null);

        System.out.println("Superclasses of ex:A in the store:");

        AGUtils.showTriples(cc);



        // Now with reasoning

        cc = ts.getStatements(true,"!ex:A","!rdfs:subClassOf",null);

        System.out.println("Superclasses of ex:A inferred:");

        AGUtils.showTriples(cc);



        // Confirm that an instance of type ex:A is an instance of its superclasses

        cc = ts.getStatements(true,"!ex:a","!rdf:type",null);

        System.out.println("Types of ex:a inferred:");

        AGUtils.showTriples(cc);



        // Close the store and disconnect from the server

        ts.closeTripleStore();

        ags.disable();

    }



}
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