Abstract
Abstract The role of databases in process plant design is reviewed. Data usage and the prevention of concurrency conflicts justify a layering of the databases into a project-wide database for information dissemination and smaller work-spaces for storage of preliminary data. The dissemination of process data is selected as a representative problem space and the information carried in a database containing a process release is characterized. The logical database design is then described, a model for representation of information at the conceptual schema level is selected and a suggested formalism for description of evolutionary graphical documents is discussed. The compatibility between binary associations (the model for schema representation) and normalized R-graphs (the formalism for evolutionary drawings) is demonstrated, and it is shown how such a formalism can be incorporated into a methodology for engineering database design. The methodology proposed is described and illustrated with some data handled...
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