初始图形交换规范（I.G.E.S.）定义了一种中性文件格式，用于促进不同CAD/CAM系统之间图形信息的传输。本规范由美国国家标准与技术研究所（National Institute for Standards and Technology）主持制定，该委员会认为，本规范正确解决了不同图形数据格式的关键通信问题。本SAE推荐规程的目的是为使用不同CAD/CAM系统的组织之间的图形数据交换建立统一规程。

The Initial Graphics Exchange Specification (I.G.E.S.) defines a neutral file format for facilitating transfer of graphic information between dissimilar CAD/CAM systems. This specification is being developed under the auspices of the National Institute for Standards and Technology and in the opinion of this committee is properly addressing the key communication issue of dissimilar graphic data formats. The purpose of this SAE Recommended Practice is to establish a uniform practice for the exchange of graphic data between organizations using dissimilar CAD/CAM systems.