Constraint databases and geographic information systems share many applications. However, constraint databases can go beyond geographic information systems in efficient spatial and...
New methods and new systems are needed to lter or to selectively distribute the increasing volume of electronic informationbeing produced nowadays. An e ective information ltering...
This paper considers conceptual and contextual issues relating to the problem of developing systems models capable of representing knowable and unknowable information requirements...
This paper proposes an overview of the IMSA application, a patient-oriented medical information system. IMSA stands for Interactive Multimedia System for Auto-medication and aims ...
symbol systems and the world. In the case of problem frames the symbol systems are abstractions of the problems that an IS will solve rather than sentences, and the world is the pr...