public function get_criteria_badge_class() {
        $badge = new badge($this->_data->id);
        $narrative = $badge->markdown_badge_criteria();
        if (!empty($narrative)) {
            $criteria = array();
            $criteria['id'] = $this->_url->out(false);
            $criteria['narrative'] = $narrative;
            return $criteria;
        } else {
            return $this->_url->out(false);
        }
    }