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. Part 304 - Abstract test suite: Mechanical design using boundary representation Part 307 - Abstract test suite: Sheet metal die planning and design AIC - Application interpreted constructs AICs are specializations of the integrated application and generic resources. This is done by subtyping interfaced entities and adding further constraints and rules. No new stand-alone entities are created and no new explicit attributes are added. Most AICs are specializations in the geometric area. AICs did not exist back in 1994 when the first release of STEP got published. But when the 2nd generation of APs grows up it becomes clear that APs do not only share not only the IRs but also a lot of specializations. AICs are a big step towards AP interoperability. Part 501 - Edge-based wireframe Part 502 - Shell-based wireframe Part 503 - Geometrically bounded 2D wireframe Part 504 - Draughting annotation Part 505 - Drawing structure and administration Part 506 - Draughting elements Part 507 - Geometrically bounded surface Part 508 - Non-manifold surface Part 509 - Manifold surface Part 510 - Geometrically bounded wireframe Part 511 - Topologically bounded surface Part 512 - Faceted boundary representation Part 513 - Elementary boundary representation Part 514 - Advanced boundary representation Part 515 - Constructive solid geometry Part 517 - Mechanical design geometric presentation Part 518 - Mechanical design shaded representation Part 519 - Geometric tolerances Part 520 - Associative draughting elements Part 521 - Manifold subsurface Part 522 - Machining features Part 523 - Curve swept solid AM - Application modules see ISO 10303 Application Modules References Computer-aided design software CAD file formats Computer file formats Lists of parts