Database Reengineering and Interoperability by John Ayre, Donald McFall, John G. Hughes, Claude Delobel

By John Ayre, Donald McFall, John G. Hughes, Claude Delobel (auth.), To-yat Cheung, Joseph Fong, Brian Siu (eds.)

Modern computing administration structures and alertness courses are usually de­ signed as open structures. In an open surroundings, the clients' software courses serving related reasons, although most likely applied utilizing assorted or software program tech­ nologies, can have interaction simply and correctly with another. yet, it's a vast problem in study and improvement to supply the potential for integrating those applied sciences and reengineering the hot or current administration structures on the way to make all the suitable elements interoperable. In case of databases, as a result of the kind in information versions and thought, the interoper­ skill and reengineering matters develop into much more complicated and the most important, in particular for firms seriously concerned with info administration. With the quick advances in networking and database modeling expertise, outdated concerns can have to be reinvestigated and new concerns arise regularly. it really is our desire that this year's workshop, the 6th in a chain of annual occasions, supplies a well timed discussion board for database researchers and practitioners to proportion their contemporary adventure and ends up in quite a few facets of this speedy -developing box. This sequence of workshops has been prepared by way of the Hong Kong machine Society and financially supported through many neighborhood commercial and enterprise businesses. This 12 months, the Cooperative learn Centre for Open platforms expertise, positioned within the division of laptop technology, urban college of Hong Kong, has joined the association group and the checklist of economic sponsors.

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1. Selecting a Database Model In the past three decades, many database models have been proposed in academic circle. However, only four of them have been successfully commercialised. They are hierarchical, network, relational and object-oriented models. In hierarchical or network models, the connections between sets of data are in the data structure and any new relationships require new access paths to be added. In a relational database, on the other hand, these access paths are not pre-established because creating new relations simply requires a joining operation, and this makes a relational database a most flexible system for queries that are arranged for a particular purpose.

5. This rule base is presented in a format devised by the author. Each rule will be represented as an active classes. The Son class inherits all the attributes and methods from the Male class and the Child class. e. e. method male) in the Son class by using the inheritance characteristic. Active generalisation is similar to Heuristics. Heuristics can combine logical operators (such as AND, OR, and NOT) to represent complex rules easily and clearly. The AND and OR logical operators combine multiple active entities together in active generalisation.

M. Huang. 1. ", Database Management Horizons, 5th International Hong Kong Computer Society Database Workshop, Hong Kong, February 1994. 2. A. and Bowles, A" 1991, "Recent Research On Deductive Object-Oriented Databases", Heriot-Watt University, Department of Computer Science, Internal Report. 3. L.. 1989. "Future Intelligent Information Systems: AI and Database Technologies Working Together". Readings in Artificial Intelligence and Databases, J. Mylopoulos and M. Brodie (eds), Morgan Kaugmann. New York.

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