/**
 * Class constructor
 *
 * @param   array  $options  Associative array of options
 *
 * @since   1.7.0
 */
public function __construct($options = array())
{
    parent::__construct($options);
    // Set mime type
    $this->_mime = 'application/xml';
    // Set document type
    $this->_type = 'xml';
}