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Procedure for Product Data Exchange Using STEP Developed in the AutoSTEP Pilot



David Rosenfeld, S Dhar


The AutoSTEP Pilot Project, directed by the Automotive Industry Action Group (AIAG), is an effort whose goal is to promote the use of STEP (STandard for the Exchange of Product model data) as a neutral mechanism for product data exchange within the automative industry. To explore and demonstrate the capabilities of STEP, AutoSTEP organized a number of trading pairs to exchange product model data represented in STEP Application Protocol 203, configuration controlled design, conformance class six, or data represented with advanced boundary representation (b-rep). Model data would be transferred from one company''s CAD system to its partner company''s system via STEP. AutoSTEP Phase One organized pairs of automotive companies and their first-tier suppliers, and involved exchanges relating to packaging applications. Later phases will include exchanges of product model data relating to other applications, and will extend the information exchange further down the supply chain. Exchange results are logged in a database, and reports assessing the results will be produced. This document provides a complete description of the product model data exchange scenario envisioned for transactions using STEP, both in general and in the context of the AutoSTEP Pilot. It outlines the entire process that model data undergoes in STEP exchanges, and it identifies the significant metrics throughout the process. It also provides forms and tables for the benefit of the AutoSTEP participants to assist them in performing exchanges and logging metrics.
NIST Interagency/Internal Report (NISTIR) - 5833
Report Number


advanced boundary representation, Automotive Industry Action Group, AutoSTEP, CAD system, interoperability, product data exchange, STEP AP203


Rosenfeld, D. and Dhar, S. (1996), Procedure for Product Data Exchange Using STEP Developed in the AutoSTEP Pilot, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed June 14, 2024)


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Created December 31, 1995, Updated October 12, 2021