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AGReasoningDomainRange.java

package com.franz.ag.examples;



import com.franz.ag.*;



public class AGReasoningDomainRange {



    /**

     * Demonstrates reasoning involving rdfs:domain and rdfs:range

     * 

     * @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("domainrange", AGPaths.TRIPLE_STORES);

                

        // Register your namespaces

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

        

        // Add some triples to the store

        ts.addStatement("!ex:a","!ex:p", "!ex:b");

        ts.addStatement("!ex:p","!rdfs:domain", "!ex:D");

        ts.addStatement("!ex:p","!rdfs:range", "!ex:R");

        

        // Retrieve some triples without reasoning (none in this case)

        Cursor cc = ts.getStatements(false,null,"!rdf:type",null);

        System.out.println("Retrieving all rdf:type's in the store (should be none):");

        AGUtils.showTriples(cc);



        // Now demonstrate reasoning

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

        System.out.println("Inferring the rdf:type of ex:a");

        AGUtils.showTriples(cc);

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

        System.out.println("Inferring the rdf:type of ex:b");

        AGUtils.showTriples(cc);



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

        ts.closeTripleStore();

        ags.disable();

    }



}
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