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The NIST Working Form for STEP



Steve Clark


The Product Data Exchange Specification (PDES) is an emerging standard for the exchange of product information among various manufacturing applications. The natural exchange medium for PDES product models is the STEP physical file format. The National PDES Testbed at NIST has developed software to manipulate and translate STEP models. This software consists of an in-memory working form and an associated physical file parser, STEPparse. The design and capabilities of STEPparser and of the STEP Working Form are discussed.
NIST Interagency/Internal Report (NISTIR) - 4351
Report Number


Product Data Exchange Specification (PDES), STEP models, parser, STEPparser, product model


Clark, S. (1990), The NIST Working Form for STEP, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed February 22, 2024)
Created November 1, 1990, Updated November 10, 2018