Specifies elements of the EXPRESS-I language. This language is a formal data representation and abstract test case specification which can be used to exemplify the information requirements of other Parts of AS 10303 and is a companion to the EXPRESS and EXPRESS-G languages. This Standard is identical with and has been reproduced from ISO/TR 10303-12:1997.
AS 10303.12-1999
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Industrial automation systems and integration – Product data representation and exchange, Part 12: Description methods: The EXPRESS-I language reference manual