Systems and Languages. The New Database Architecture Framework - A Progress Report (L. Mark and N. Roussopoulos). An Entity-Relationship Query Language (B. Demo, A. DiLeva and P. Giolito). ADE: Mapping between the External and Conceptual Levels (T.L. Anderson and B.B. Claghorn). Modeling Approaches I. Clocks and their Use for Time Modeling (G. Richter). Time and Space in Information Systems (U. Schiel). Modeling Approaches II. Connections among Application Based Objects in Directed Edge-Labelled Hypergraphs (M. Morgenstern). A Graphtheoretic Semantics for Semantic Data Models (U. Pletat). An Approach to Conceptual Schema Design of Information Systems (A. Horndasch, R. Studer and R. Yasdi). A Framework for Representation (C.-G. Jansson). Logical Frameworks. Specifying Admissibility of Dynamic Database Behaviour Using Temporal Logic (U.W. Lipeck, H.-D. Ehrich and M. Gogolla). The INFOLOG Branching Logic of Events (J. Carmo). Towards Simpler and Yet Complete Formal Specifications (P.A.S. Veloso and A.L. Furtado). A Tableaux Approach for Consistency Checking (C. Kung). Modeling Approaches III. Specification of Control Aspects in Office Information Systems (G. Bracchi and B. Pernici). The PAMS Approach to Modeling Database Activity (R.S. Flint and N.G. Leveson).