摘要： 讨论了EXPRESS标准语言的知识表达能力,给出了采用EXPRESS表达的知识模型以及建模规则,根据CAD/CAM产品模型的特点,提出了基于特征的知识模型,并给出了建模的约束规则表达,以及与知识库的集成。

关键词: 知识表达, 知识特征模型, EXPRESS, 规则和约束

Abstract: This paper discusses the ability on knowledge expression of the standard language, EXPRESS, and gives a knowledge model and its rules, which is expressed by EXPRESS. On view of the character of CAD/CAM product model, it proposes a feature model of CAD/CAM knowledge, and gives an expression of rules and constraints in the knowledge lib. A method that the model is integrated with knowledge lib is given in the end.

中图分类号: 

• TP391.7