NOTE: the information on this page pertains to AllegroGraph version 3.x. There is no corresponding 4.x page at this time.

AGReasoningDomainRange.java

package com.franz.agbase.examples;

import com.franz.agbase.*;

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)
        TriplesIterator 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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