This International Standard specifies the characteristics of the core constructs necessary for computer-supported modelling of enterprises conforming to ISO 19439. This International Standard focuses on, but is not restricted to, the computer integration of the information aspects of manufacturing, including the management and control technology and the required human tasks. It does not specify how these core constructs for model-based operations are to be implemented and, in particular, it does not include the control language needed to specify and execute (internal) activity behaviour, nor the mapping between functional operations and capabilities. NOTE Computer-supported modelling of enterprises can form a precursor to computer integration or human-system intermediation.