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AGReasoningInverseOf.java

package com.franz.agbase.examples;



import com.franz.agbase.*;



public class AGReasoningInverseOf {



    /**

     * Demonstrates reasoning involving owl:inverseOf

     * 

     * @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 a fresh triple-store for this example.

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

        

        // Register your namespaces

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

        

        // Add some triples to the store

        ts.addStatement("!ex:a","!ex:owned-by","!ex:b");

        ts.addStatement("!ex:c","!ex:owns","!ex:d");

        ts.addStatement("!ex:jans","!ex:owns","!ex:birra");

        ts.addStatement("!ex:owned-by","!owl:inverseOf","!ex:owns");



        // Retrieve some triples without reasoning 

        TriplesIterator cc = ts.getStatements(false, null, null, null);

        System.out.println("Ground triples in the store:");

        AGUtils.showTriples(cc);



        // Now demonstrate reasoning

        TriplesIterator cc2 = ts.getStatements(true,null,"!ex:owned-by",null);

        System.out.println("owned-by triples in the store and inferred:");

        AGUtils.showTriples(cc2);



        // Close the triple store and disconnect from the server.

        ts.closeTripleStore();

        ags.disable();

    }



}
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