通过阐述产品定义数据类型，分析了汽车车身产品特点，提出了汽车车身产品定义模型。
In this paper, the author analyses the character of automobile body products by discussing the data types of product definition, and thereby proposes definitive model of automobile body product.
基于虚拟企业的思想，分布式环境下的协同产品开发系统迫切需要有一个合理的产品定义模型。
Based on the concept of virtual enterprise, it is necessary to develop a proper product definition model for collaborative product development system in distributed environment.
介绍了研制的回转体零件的特征库、产品定义模型和数据结构，并以中性文件的形式输出产品信息，实现了CAD/CAPP的集成。
In this paper, we introduce feature taxonomy about rotational parts, describe PDM's data structure and use neutral file to realize the CAD/CAM integration.
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