This paper will introduce the description and implementation methods of Industry Foundation Classes (IFC) by instances for your further study, development and application.

This paper will introduce the shape representation and spatial structure of Industry Foundation Classes (IFC) by instances for your further study, development and application.

The engineering design model based on IFC standard contains vast amount of data and complex non-graphic information, which often results in lower efficiency for designers to inquire and manage the data information. Through the analysis of the data integration mechanisms of IFC model and the mapping rules of EXPRESS data types, as well as the exchange technologies of IFC neutral files, the principles of standard data access interface and the data features of engineering design model, a database application system of engineering model, which based on the CFG Graphic platform of PKPM software, was designed and developed. A gymnasium project, which locates at Beijing, was used as the case study. The IFC format model of the gymnasium was read, and the main functions of the application system such as read, query, create, and two-dimensional display were applied respectively. The results show that the system can help designers to improve the daily maintenance and management operation of the IFC format data of engineering design model.

Survey and design industry in the construction field, which take the first application of computer technology in China, has become a developed industry.PKPM software, which combines structural analysis and construction plans in one platform, is the most widely used software in China.However, the exchange of information between different software is mainly done by hand, which badly hinders the software from further popularization.It lies in the establishment of the "standard" to solve the problem of information exchange and data sharing.With a uniform standard, there will be a common language to transfer information between different systems.For this purpose, the IAI organized IFC standards.In this paper, the data interface from PKPM to the IFC is introduced.