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Initial NIST Testing Policy for STEP - Beta Testing Program for AP203 Implementation



Mary Mitchell


The standard for Product Data Representation and Exchange, ISO 10303, defines a neutral, computer-interpretable representation for describing product data in a manner that is independent from any particular system. This standard is more commonly known as STEP, (Standard for the Exchange of product data) and it is designed to support a wide range of design, engineering, and product support applications. Support for specific applications is provided through an Application Protocol. This document describes the policy and procedures for a beta conformance testing program for one of these application protocols: Configuration Controlled 3D Design for Mechanical Parts and Assembles (ISO 10303-203). However, the concepts described are applicable to ISO 10303 in general and the characteristics of the longer term testing program are described.
NIST Interagency/Internal Report (NISTIR) - 5535
Report Number


AP 203, ISO 10303, PDES, STEP


Mitchell, M. (1994), Initial NIST Testing Policy for STEP - Beta Testing Program for AP203 Implementation, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed April 15, 2024)
Created May 31, 1994, Updated October 12, 2021