Titlebook: Database Systems of the 90s; International Sympos Albrecht Blaser Conference proceedings 1990 Springer-Verlag Berlin Heidelberg 1990 DBMS.a

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,Management of Multimedia Complex Objects in the ’90s,the other sessions, and several solutions will be given. There is a huge amount of work in research and development in order to have systems which are both easy to use and efficient. We believe more in the integration of several different fields (e.g. programming languages and databases) rather than in the emergence of completely new fields.

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Object-oriented database systems: Concepts and perspectives,cover some more extensive requirements for object-oriented database systems as they are introduced by non-standard applications. Moreover, the paper attempts to identify the most important variants by which a feature may be realized and shows some open fields for research work.

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Contemporary Trends in Systems Developmentfine equality classes, which also determine the level of quality or consistency of a replicated data item. Also data processing mechanisms, by which indirectly data are assigned to certain equality classes, are discussed and assessed with regard to their extensional and intensional meaning.

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