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The paper describes the RE-SEARCH ALPS project, which aims to gather, consolidate, harmonize and make available to different targets (public and private bodies working at local, regional and national level) data about laboratories, research and innovation centers which are active in particular in the regions of seven countries which constitute the Alpine Area (France, Italy, Switzerland, Austria,...
Object database systems have now been on the market for about 4 years. They have evolved considerably and are now slowly converging to common and accepted overall architecture. The goal of this paper is to describe this architecture. An object database system supports an object database model. This model can be decomposed into four different aspects: data, behavior, persistence and naming....
This paper describes the design and implementation of the first version of the O2 object-oriented database system. The Altaïr project is currently designing and implementing a complete environment for developing data intensive applications. As a first step, we have implemented a quick prototype of an object-oriented DBMS. We report here on this implementation. The first part of the paper...
This paper addresses the problem of understanding the current set of commercially available object-oriented database systems. It proposes a classification of these systems based on their external behavior and on the target customers they are aimed at. The classification distinguishes four categories: language oriented database systems, persistent programming languages, engineering database systems...
In this paper, we have studied the problem of completeness of relational query languages. We have etablished a criterion for completeness. A query language was proved to be complete. Since this language is the one used as a standard for completeness this results gives strong theoretical basis to Codd's definition of completeness. There are however some limitations to this notion of completeness...
Database technology is currently being pushed by the needs of new applications and pulled by the oppor- tunities of novel developments in hardware and systems architecture. The invited paper, two panel sessions and 27 papers in this volume report on how the technology is currently extending. One broad area covered is extended database semantics, including data models and data types, databases and...
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