OBJECT ORIENTED PDM DATA ORGANIZATION AND FRAMEWORK

A PDM framework with an open structure and strong scalability for data organization is presented．The data expression paradigm with a distributed，multi-tier C／S system configuration and an object oriented STEP based data model together with extended ER schema are explored．Moreover，the paper gives the definition of abstract objects and their different types．A prototype PDM system named CASS-PDM is under development and is expected to offer a better scalability and adaptability．