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ISO 10303-11

2nd Edition, November 1, 2004

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Industrial Automation Systems and Integration - Product Data Representation and Exchange - Part 11: Description Methods: the EXPRESS Language Reference Manual

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Description / Abstract:

This part of ISO 10303 specifies a language by which aspects of product data can be defined. The language is called EXPRESS.

This part of ISO 10303 also specifies a graphical representation for a subset of the constructs in the EXPRESS language. This graphical representation is called EXPRESS-G.

EXPRESS is a data specification language as defined in ISO 10303-1. It consists of language elements that allow an unambiguous data definition and specification of constraints on the data defined.

The following are within the scope of this part of ISO 10303:

— data types;

— constraints on instances of the data types.

The following are outside the scope of this part of ISO 10303:

— definition of database formats;

— definition of file formats;

— definition of transfer formats;

— process control;

— information processing;

— exception handling.

EXPRESS is not a programming language.
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