loading an onotlogy into memory

loadAboxTBox.java

final String JENA_PATH = "/home/PATH/ontologies/";
final String SOURCE = "http://www.semanticweb.org/ontologies/2016/1/";
final String TBOX_FILE = "semantic_mapping_domain_model.owl";
final String ABOX_FILE = "semantic_map1.owl";

/**
 * Importing Tbox
 */
 OntModel tbox = ModelFactory.createOntologyModel( OntModelSpec.OWL_MEM );
 OntDocumentManager dm_tbox = tbox.getDocumentManager();
 dm_tbox.addAltEntry(SOURCE+TBOX_FILE,"file:"+TBOX_FILE);
 tbox.read(SOURCE+TBOX_FILE,"RDF/XML");

/**
 * Importing Abox
 */
 OntModel abox = ModelFactory.createOntologyModel( OntModelSpec.OWL_MEM);
 OntDocumentManager dma = abox.getDocumentManager();
 dma.addAltEntry( SOURCE + ABOX_FILE , "file:" + ABOX_FILE);
 abox.read(SOURCE + ABOX_FILE,"RDF/XML");