摘要
工艺知识库是CAPP系统的重要组成部分。本文提出一种分类层次模型以组织和管理工艺知识，并据此建立工艺知识库PPKBS。用四种形式表达工艺知识，并以外部和内部两种形式表现。提出了工艺知识的冗余、矛盾和句法结构检查方法。
Process knowledge is an important part of CAPP system. This paper presents a classification and hierarchymodel for supervising knowledge, and sets up a process knowledge base (PPKBS) using the model. The processknowledge is expressed with four types which have internal and external style. The methods for diagnosing the semanticinconsistency, redundancy and grammar fault of knowledge are given.
