East/West Database Workshop, Proceedings of the Second International East/West Database Workshop, Klagenfurt, Austria, 25-28 September 1994

Proceedings of the East - West International Conference on Multimedia , Hypermedia , and Virtual Reality MHVR ' 94 September 14 -

Chimera: A Model and Language for Active DOOD Systems

Chimera is a novel database model and language which has been designed as a joint conceptual interface of the IDEA project, a major Euro-pean cooperation initiative aiming at the integration of object-oriented, active and deductive database technology. In this paper, we present a view of the main features of Chimera and discuss the design choices made. The most remarkable characteristic of Chim...

Persistent Object Systems and Interoperability: Linguistic and Architectural Requirements

An important aspect of currently developed persistent object systems is support for interoperability with other systems. A central issue in supporting interoperability is achieving type compatibility. We argue that abstraction is also a key interoperability issue. The level of abstraction depends on such features as modularity, encapsulation, orthogonality, minimality, clean and precise semanti...

Visual Specification of Complex Database Actions

The paper presents an approach to specify in an integrated way by visual , diagrammatic languages the structural and behavioural aspects of database applications. Hereby, well-known extended Entity-Relationship diagrams are employed to specify the structural aspects. The behavioural aspects of a database application are speciied by using ViAL (Visual Action Language). ViAL speciications are a s...

Logical and Conceptual Models for the Integration of Information Retrieval and Database Systems

We present two new approaches to the problem of integrating information retrieval (IR) and database (DB) systems. On the logical level, IR is based on uncertain inference, which is a generalization to the certain inference process employed in DB systems. As an implementation of this concept, we present a probabilistic relational algebra. On the conceptual level, we distinguish between the logic...