Reengineering involves the re-design of an existing Information System, whilst utilising as much of the existing system as possible. This text takes a practical approach to re-engineering existing systems and looks at data integration, and focuses on proven methods and tools for:- the conversion of hierarchical or network database systems into relational database technology, or from relational to object-oriented and XML databases- the integration of database systems and expert systems to produce MIS and EIS systemsTaking a very practical approach, the book describes in detail database conversion techniques, reverse engineering and forward engineering, and re-engineering methodology for information systems, offering a systematic software engineering approach for reusing existing database systems built with 'old' technology. Many examples, illustrations and case studies are used, making the methodology easy to follow.

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