处理复杂数据流的难度导致了第三条准则的出现：围绕 XML 处理管道来设计应用程序，从而让数据流更容易进入安全威胁评估。

The difficulty of dealing with intricate data flow leads to the third principle: Design your applications around XML processing pipelines to make data flow easier to factor into threat assessment.

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绘出数据流图，明白地知道数据如何被使用、被哪些人使用，以便你能评估所面临的风险，并决定如何处理它们？

Diagram the flow of data to be aware how data is consumed and by who, so that you can evaluate the risks involved and determine how to deal with them.

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介绍了桥梁评估专家系统的基本结构，描述了桥梁评估专家系统的数据流。

The basic structure of bridge evaluation expert system is introduced, then the data stream of it is described.

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