Entity-relationship approach : the core of conceptual modelling : proceedings of the Ninth International Conference on the Entity-Relationship Approach, Lausanne, Switzerland, 8-10 October, 1990

Invited paper: Knowledge Representation, Semantic Data Modelling: Similarities and Differences (A. Borgida). Twenty-five contributed papers. Two panels. Tutorials: Entity-Relationship Models: Formal Specification and Comparison (J.L. Hainaut). ISO Database Standards - A Summary and Review of Status (T.W. Olle). Active Database Management Systems: Requirements, State-of-the-Art, and an Evaluation (S. Chakravarthy). ER Modelling for Urban Data Management (R. Laurini). Object-Oriented Modeling and Reasoning (M.V. Mannino, I.J. Choi). Author Index .