Invited Paper: The Leading Edge of Database Technology (W. Kent). Some Reflections on the Namur Conference on Information System Concepts (A.A. Verrijn-Stuart). Proof-Theoretic Conceptual Modeling: The NIAM Case Study (C. Sernadas, J. Fiadeiro, R. Meersman, A. Sernadas). Three Roles of Conceptual Models in Information System Design and Use (R. Wieringa). System Specification Semantics: Defining the Knowledge Captured by Structured System Development Methods in Conceptual Models (A.G. Sutcliffe, W.J. Black, P. Loucopoulos). An Ontological Evaluation of Systems Analysis and Design Methods (Y. Wand, R. Weber). A Generic Entity-Relationship Model (J.L. Hainaut). Executable Specifications for Distributed Information Systems (K.M. van Hee, L.J. Somers, M. Voorhoeve). An Axiom and Architecture for Information Systems (G.M. Nijssen). Framework for Architectures in Information Planning (P.A.M.M. van der Poel, R.M.C. van Waes). About Entities, Complex Objects and Object-Oriented Data Models (C. Parent, S. Spaccapietra). The Basic Building Blocks of Information Systems (A. Sernadas, J. Fiadeiro, C. Sernadas, H.D. Ehrich). Integration of Information Submodels (D.A. Jardine, S. Yazid). A Taxonomy of Concepts for the Science of Information Systems (G. Bergheim, E. Sandersen, A. Solvberg). Levels of Abstraction as a Conceptual Framework for an Information System (J. Iivari). Towards a Common Understanding of Information System Concepts? (E.D. Falkenberg).
