@Override
  public InputStream getOntologySchema(String syntax) throws IOException {
    InputStream is;
    JenaBeanExtension jbe;

    // create the ontology schema
    lock.readLock().lock();
    InputStream fileIn = new FileInputStream(ontologyFile);
    jbe = new JenaBeanExtensionTool();
    jbe.loadStatements(fileIn, Syntax.RDF_XML);
    fileIn.close();
    lock.readLock().unlock();
    is = jbe.getOntologySchema(Syntax.RDF_XML_ABBREV);

    return is;
  }