Information modelling for system specification representation and data exchange

Presents the emerging STEP standard AP-233, with a focus on the non-functional requirements that have guided the development process. The purpose of this paper is to present and motivate the modelling assumptions and approach selected for the AP-233 information model, and to describe how the EXPRESS information modelling language has been used. Although the paper focuses on AP-233 and the constraints imposed by the STEP framework, the structures and requirements presented are believed to be general and applicable to other systems engineering information-modelling projects.

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