Abstract Test Suite
An ATS is a formal description on how to test STEP implementations for conformance. They contain a test plan for postprocessors (exporting STEP data) and preprocessors (importing STEP data). The structure of an ATS is defined in part 34.
The original plan of STEP was to have for every AP 2xx a corresponding ATS 3xx, but only a few were finally realized till today.
Read more about this topic: List Of STEP (ISO 10303) Parts, ATS
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