{{unreferenced, date=December 2009
The STEP ISO 10303 Application modules define common building blocks to create modular Application Protocols (AP) within
ISO 10303
ISO 10303 is an ISO standard for the computer-interpretable representation and exchange of product manufacturing information. It is an ASCII-based format. Its official title is: ''Automation systems and integration — Product data represe ...
. Higher-level modules are built up from lower-level modules.
The modules on the lowest level are ''wrappers'' of concepts, defined in the Integrated Resources (IR) or Application Integrated Constructs (AIC). Modules on a medium level link lower level modules with each other and specialize them. Only modules on the highest levels completely cover a particular area so that they can be implemented.
See also
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List of STEP (ISO 10303) parts
An incomplete list of parts making up STEP ( ISO 10303):
Descriptions methods
* Part 1 - ''Overview and fundamental principles'' (1994). Unfortunately outdated, not covering the role of AICs and modules.
* Part 11 - ''EXPRESS language reference m ...