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.
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