BS 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:描叙方法.EXPRESS-I 语言参考手册

标准号：BS ISO/TR 10303-12-1997
中文标准名称：工业自动化系统和集成.产品数据表示和交换.第12部分:描叙方法.EXPRESS-I 语言参考手册
英文标准名称：Industrial automation systems and integration - Product data representation and exchange - Description methods - The EXPRESS-I language reference manual
标准类型：J04
发布日期：1998/10/15 12:00:00
实施日期：1998/10/15 12:00:00
中国标准分类号：J04
国际标准分类号：35.240.50
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.