초록
Standardization for product data has not been well established and many different presentation methods are being used in CAD/CAM industry. In order to accomplish system integration or concurrent engineering in such situation, product data exchanges among heterogeneous system are needed. This paper presents a data exchange system between IGES and STEP (AP 202 and 203). The schemata of those standard data formats are represented in EXPRESS and the relationship between corresponding entities are written in EXPRESS-X. Relationships among Non-geometric entities (such as color and annotations) as well as geometric entities are examined. Because the system implemented in this research uses high-level schema language and mappign language, it can be easily extended to support new data formats.