The fault analysis branch was formed from top-event to bottom event of fault tree. The knowledge was saved in repository with chain table structure.

并用故障树表示故障原因及其传播逻辑关系，从故障树的顶事件至底事件形成故障分析支路，获取的知识以链表的结构存于知识库。

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By designing a serial of common structures to store knowledge points' attributes, we established a cascade tree structure and a supporting network model to store domain knowledge.

通过制定一个知识点属性的通用存储结构；建立基于知识点的领域知识的树状层次结构和知识点间联系的支撑网络结构，即领域知识结构模型。

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