public function __construct($title, &$vars)
{
parent::__construct($title, $vars);
$formats = array(Horde_Data::EXPORT_CSV => 'Comma-Delimited (CSV)', Horde_Data::EXPORT_TSV => 'Tab-Delimited');
$this->addVariable(_("Data Format"), 'format', 'enum', true, false, null, array($formats));
}