: 逻辑数据流(Logical data flow),在系统中两个不同对象之 间传递数据,这种数据流可以连接所有类型的对象。 : 数据存储（Data store），存储系统中所需要的数据。
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Before it can be processed and transformed by the message flow, it must be converted into a logical message tree, which is a broker data structure that reflects the logical structure of the message.
在消息流能够处理和转换它之前，必须将其转换为逻辑消息树，这是反映消息逻辑结构的代理数据结构。
Including overall system design, data flow and logical framework, divided into various functional modules, system design and function modules, such as specific part of the achievement.
包括系统整体设计，逻辑框架与数据流程，各个功能模块划分，系统功能模块的设计与具体实现等部分。
You can think of a channel as a logical representation of the data flow between the L2CAP layers in remote devices.
你可以把通道想象成两个远程设备的L2 CAP层之间的数据流的逻辑形式。
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