Display server — This pattern defines the presentation implementation as an abstract service for displaying information and subscribing to events.

显示服务器——此模式将表示实现定义为显示信息和订阅事件的抽象服务。

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When a topic-subscribing client connects to the JMS server, it can request messages that fit into a specific section of the hierarchy. As an example, consider the hierarchy outlined in Figure 3.

当订阅某个主题的客户机连接到JMS服务器时，它可以请求适合层次结构特定部分的消息。

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The PIM server then notifies subscribing service users, such as conference participants, of the identity of the service provider that is registered on the network.

PIM服务器随后向诸如会议参与者的预约服务用户通知在网络上登记的服务提供者的标识。

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