The maintenance functions let you either deal with all assertions as a single group (e.g. get_publisherAssetions / set_publisherAssertions) or individually (e.g. add_publisherAssertions / delete_publisherAssertions).

• 维护功能类消息能够使发布者既能对所有断言执行单条操作(如，add_publisherAssertions和delete_publisherAssertions)也能对所有断言作为一组(如，get_publisherAssetions和set_publisherAssertions)一起操作。