在这个模型中，一个应用程序将消息发布到某个被称为主题的目的地那里，该消息被任意已经预定了这个特定主题的应用程序接收。

In this model, an application publishes a message to a certain destination called a topic; there, the message is picked up by any application that has subscribed to that particular topic.

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注意，SRS 名称和 ID 是任意的，而且是每个数据库本地的，但是底层的坐标系常常是根据行业特权而预定义的。

Note that SRS names and IDs are arbitrary and local to each database, but the underlying coordinate systems are often predefined, with reference to industry authorities.

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该工具还提供了一些预定义的转换，将uml模型转换为任意支持的编程语言。

This tool also provides several predefined transformations that will convert the UML model into any of the supported programming languages.

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