Check the tags arg only contains valid type for tags
        :param tags: output of create_tags_from_dict
        :return: True if correct format, False otherwise

def check_format(cls, tags):
        """
        Check the tags arg only contains valid type for tags
        :param tags: output of create_tags_from_dict
        :return: True if correct format, False otherwise
        """
        common, _, _ = tags
        for tag in common:
            if tag.get_type() != 0:  # Unknown type -> incorrect
                return False
        return True