ISO/TR 10303-12-1997
工业自动化系统和集成 产品数据表示和交换 第12部分:描述方法 EXPRESS-I语言参考手册
Industrial automation systems and integration - Product data representation and exchange - Part 12: Description methods: The EXPRESS-I language reference manual
- 适用范围
- This part of ISO 10303 defines a language by which an instance of (part of) a universe of discourse can be displayed. It also provides a formal description method for supporting the specification of abstract test cases. The language is called EXPRESS-I. It is a companion language to EXPRESS which is specified in ISO 10303-11. EXPRESS-I is an instantiation language for a conceptual schema language as defined in ISO TR 9007, and the particular conceptual schema language that formed the starting point for EXPRESS-I was EXPRESS. The EXPRESS-I language provides for the display of the state of the objects belonging to a universe of discourse and the information units pertaining to those objects. The following are within the scope: — display of instances of schemas; — display of instances of types and entities; — abstract test case data; — mapping from EXPRESS schemas and data types to EXPRESS-I instances. The following are outside the scope of this part of ISO 10303: — mapping from other (conceptual schema) languages to EXPRESS-I; — definition of database formats; — definition of file formats; — definition of transfer formats; — process control; — information processing; — exception handling. EXPRESS-I is not a programming language.