Objective The main objective of this proposal is to study the storage of constraints in databases, the use of constraint handling techniques in database query and update, and the incorporation of constraints in object data modelling and database specification. The recent success of the constraint-based programming paradigm is based on the direct contribution of constraints to program specification, implementation and maintenance. Constraints are the normal language of discourse for many high-level applications; built-in constraint solvers and active constraints contribute to efficient implementation; and the clarity and brevity of constraint programs simplify program maintenance.ACTIVITIES The formal properties of constraints in databases and database queries will be studied; their role in query optimisation; the consequences of stored constraints on database indexing; constraints on stored objects; and the relationship between active constraints and integrity constraints. On the practical side, the focus is on supporting the decision making process by the application of constraint handling techniques to large scale geographical data bases. The techniques will also be applied to commercially motivated problems of scheduling and tutoring. It is planned to use the working group to build a long-lasting European Interest Group which will drive and exploit continuing research and development in the field of Constraint Databases. Through regular workshops, it is hoped to attract representatives of European industry and the public sector, as well as the academic community. POTENTIAL We seek to lay the foundations for a technology with considerable market potential. Within Europe there is a firmly established need for systems supporting complex information and decision making. We identify in particular: the aerospace industry; earth observation; air and ground transportation control; telecommunications network planing and signal routing; town and environmental planning; and production, maintenance and servicing in manufacturing. Fields of science natural sciencescomputer and information sciencesdatabasesengineering and technologyelectrical engineering, electronic engineering, information engineeringinformation engineeringtelecommunicationstelecommunications networks Programme(s) FP3-ESPRIT 3 - Specific research and technological development programme (EEC) in the field of information technologies, 1990-1994 Topic(s) Data not available Call for proposal Data not available Funding Scheme Data not available Coordinator European Computer-Industry Research Centre GmbH Address Arabellastraße 17 81925 München Germany See on map EU contribution € 0,00 Participants (6) Sort alphabetically Sort by EU Contribution Expand all Collapse all HUMBOLDT UNIVERSITAET ZU BERLIN Germany EU contribution € 0,00 Address Unter den linden 6 Berlin See on map Links Website Opens in new window Humboldt-Universität zu Berlin Germany EU contribution € 0,00 Address Spandauerstraße 1 10178 Berlin See on map National Technical University of Athens Greece EU contribution € 0,00 Address Heroon polytechniou 9 15773 Zographou, athens See on map PARIS RESEARCH LABORATORY DIGITAL EQUIPMENT France EU contribution € 0,00 Address 85 avenue victor hugo 92563 Rueil-malmaison See on map TECHNICAL UNIVERSITY VIENNA Austria EU contribution € 0,00 Address Gusshausstrasse, 27/29 1040 Wien See on map UNIVERSITY OF TWENTE Netherlands EU contribution € 0,00 Address Drienerlolaan, 217 7500 AE Enschede See on map
