指定用于产品定义数据的数字表示和通信的信息结构。本标准的使用允许各种计算机辅助设计和计算机辅助制造（CAD/CAM）系统使用的产品定义数据的兼容交换。它与美国商务部国家标准局初始图形交换规范（IGES）4.0-1988版相同，并已复制自该规范。

Specifies information structures to be used for the digital representation and communication of product definition data. Use of this Standard permits the compatible exchange of data of product definition data used by various computer-aided design and computer-aided manufacturing (CAD/CAM) systems. It is identical with and has been reproduced from the U.S. Department of Commerce's National Bureau of Standards Initial Graphics Exchange Specification (IGES) Version 4.0-1988.