为了实现数据对应用程序的独立性，应用程序自行定义所需要的局部逻辑数据结构。

In order to keep the data independence from application program, the necessary local logical data structure can be self-defined in every individual application program.

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由于“行”的概念与二进制文件无关(逻辑数据结构通常都不是由新行终止)，因此您必须指定需要读入的字节数。

Because the concept of "lines" isn't relevant for binary files (logical data constructs are not generally terminated by newlines), you must always specify the number of bytes that you wish to read in.

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公共信息模型CIM是电力企业应用集成的重要工具、是逻辑数据结构的灵魂、是可定义的信息交换模型。

CIM is an important tool in integration, which has defined the information sharing model. It is also soul of logical data structure.

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