Secondly, by synthesizing the existing CAPP theories and technologies and combining above MPIS system architecture, the process information unified model is built to establish the data base of MPIS.

• 2)综合已有的CAPP理论和技术，结合上述制造工艺信息系统体系结构，构造工艺信息统一模型，支持工艺信息的相对关系描述、数据内容表示以及各种应用模式。