STEP (ISO 10303)

• STEP: Product information exchange standard.
• STEP Schema: Information model written in EXPRESS.
• EXPRESS: STEP’s data definition language.
• EXPRESS-G: Graphical form of EXPRESS.
• STEP File: Populated STEP Schema (a.k.a. data file, Part 21 file).
• Application Protocol (AP): Implementable portion of STEP. A schema for a particular application.

STEP (ISO 10303)

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