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Standardized Data Exchange of CAD Models with Design Intent



Junhwan Kim, Mike Pratt, Raj G. Iyer, Ram D. Sriram


Modern CAD systems generate feature-based product shape models with parameterization and constraints. Until recently, standards for CAD data exchange among different CAD systems were restricted to the exchange of pure shape information. These standards ignored the construction history, parameters, constraints, features and other elements of ?design intent? present in the model to be transferred. This paper suggests an implementational foundation for CAD data exchange with preservation of design intent, based on the use of newly published parts of the International Standard ISO 10303 (STEP). Case studies are presented which employ a hypothetical STEP application protocol (AP) using Parts 55, 108 and 111 of ISO 10303. A prototype translator based on this AP has been implemented and tested. The paper reports on the experience gained in ?intelligent? data exchange.
Journal of Computer-Aided Molecular Design


CAD models, constraints, construction history, Data exchange, design intent, parameterization, STEP


Kim, J. , Pratt, M. , Iyer, R. and Sriram, R. (2007), Standardized Data Exchange of CAD Models with Design Intent, Journal of Computer-Aided Molecular Design, [online], (Accessed April 23, 2024)
Created August 31, 2007, Updated October 12, 2021