A language facility for designing database-intensive applications
ACM Transactions on Database Systems (TODS)
Some high level language constructs for data of type relation
ACM Transactions on Database Systems (TODS)
Program development by stepwise refinement
Communications of the ACM
Data and activities: Exploiting hierarchies of classes
Proceedings of the 1980 workshop on Data abstraction, databases and conceptual modeling
Design and verification of information systems
Design and verification of information systems
Modeling concepts for VLSI CAD objects
ACM Transactions on Database Systems (TODS)
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This position paper is intended to provide a perspective for research on conceptual modelling carried out over the past five years at the University of Toronto and to draw some conclusions from the experiences we have accumulated. “Conceptual modelling” here refers to the activity of constructing abstract models of knowledge about some world and is synonymous with the terms “knowledge representation” and “semantic data model” as they have been used in AI and Databases respectively. Much of the research on the subject has focused on the development of descriptive tools for the description of such models. Less attention has been paid, so far, on methodologies for building such models.