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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