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AGReasoningSubPropertyOf.java

package com.franz.agbase.examples;



import com.franz.agbase.*;



public class AGReasoningSubPropertyOf {



    /**

     * Demonstrates basic reasoning involving rdfs:subPropertyOf

     * 

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

        

        // Register your namespaces

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

        

        // Add some triples to the store

        ts.addStatement("!ex:p","!rdfs:subPropertyOf", "!ex:q");

        ts.addStatement("!ex:q","!rdfs:subPropertyOf", "!ex:r");

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

        

        // Retrieve some triples without reasoning 

        TriplesIterator cc = ts.getStatements(false,"!ex:p","!rdfs:subPropertyOf",null);

        System.out.println("Retrieving super-properties of ex:p");

        AGUtils.showTriples(cc);



        // Now with reasoning

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

        System.out.println("Inferring super-properties of ex:p");

        AGUtils.showTriples(cc);



        // Retrieve without reasoning properties that hold between ex:a and ex:b

        cc = ts.getStatements(false,"!ex:a",null,"!ex:b");

        System.out.println("Retrieving properties that hold between ex:a and ex:b");

        AGUtils.showTriples(cc);



        // Now with reasoning

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

        System.out.println("Inferring properties that hold between ex:a and ex:b");

        AGUtils.showTriples(cc);

        

        // Close the store and disconnect from the server

        ts.closeTripleStore();

        ags.disable();

    }



}
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