function createOrganizer() {
    $cnt = count( $this->organizer );
    if( 0 >= $cnt )
      return;
    $attributes = $this->_createParams( $this->organizer['params']
                                      , array( 'CN', 'DIR', 'LANGUAGE', 'SENT-BY' ));
    $content    = 'MAILTO:'.$this->organizer['value'];
    return $this->_createElement( 'ORGANIZER', $attributes, $content );
  }