但 SDO 与数据传输对象依然存在共性：仅传送数据，没有为之定义的应用方法或业务逻辑。
They still have this in common with Data Transfer Objects, though: They are only carriers of data and do not have application methods or business logic defined for them.
同时将PLC的逻辑控制、数据运算、数据比较、数据传送通过程序有机的结合起来，既控制交通灯的变化，还有时间显示。
While PLC logic control, data operations, data comparison, data transmission through the process of combining organic and not only control the traffic light changes, as well as the time display.
DECP由数据访问层、业务逻辑层、安全代理、数据传送代理、客户代理、消息层、事务管理器七个部分组成。
DECP is made up of data access layer, business logic layer, security proxy, data transport proxy, client proxy, messages layer and transactions manager.
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