This standard specifies the intermediate interface technology provided by different software systems related to the technical information system (TIS) and open for information exchange. These software systems can be mainly divided into the following categories: PDM, CAD, CAPP, etc. The open intermediate interface can be used to support many other software systems related to modern design engineering, such as CAE, CAM, etc., and can also support management information such as ERP system. This standard is applicable to guide enterprises in the process of implementing technical information integration, define the dynamic interface of different software or use it as a reference for judging the degree of integration when purchasing related software.