public function definition() {
        $mform = $this->_form;

        $mform->addElement('header', 'database', get_string('dbexport', 'tool_dbtransfer'));
        $mform->addElement('textarea', 'description', get_string('description'), array('rows'=>5, 'cols'=>60));
        $mform->setType('description', PARAM_TEXT);

        $this->add_action_buttons(false, get_string('exportdata', 'tool_dbtransfer'));
    }