The exchange of data model in engineering design is an important process in the evolution of two-dimensional paper expression and evolution to the 3D digital model of computer aided design. This paper briefly describes the application of building information model of interaction and cooperation, and then makes a preliminary analysis on the extension of the standard IFC data format in engineering applications.%工程设计建造的数据模型的交换是从二维纸张表达进化至计算机辅助设计的三维数字模型中一个重要的交流过程。本文简要描述建筑信息模型的交互协同案例的应用，然后对标准IFC数据格式在工程应用中的扩展问题做初步分析。
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