function createDescription() {
    $cnt = count( $this->description );
    if( 0 >= $cnt )
      return;
    $descriptions    = null;
    foreach( $this->description as $description ) {
      $attributes    = $this->_createParams( $description['params'], array( 'ALTREP', 'LANGUAGE' ));
      $content       = $this->_strrep( $description['value'] );
      $descriptions .= $this->_createElement( 'DESCRIPTION', $attributes, $content );
    }
    return $descriptions;
  }