Also known as .step, .stp, .p21, Standard for the Exchange of Product model data, STEP CAD interchange format, ISO 10303-21
file format
STEP interchange format
paulbourke.net →Plain text file format. Based on EXPRESS language schema. Deals with named objects rather than just raw geometric information.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).