public function fieldLabels($includerelations = true)
    {
        $labels = parent::fieldLabels($includerelations);
        $tagLabels = array(
            'Title'       => _t('Tag.TITLE', 'Title'),
            'Description' => _t('Tag.DESCRIPTION', 'Description'),
            'Impression'  => _t('Tag.IMPRESSION', 'Impression image'),
        );

        return array_merge($tagLabels, $labels);
    }