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dc.contributor.author Ding, Yi en_US
dc.date.accessioned 2007-05-18T19:56:47Z
dc.date.available 2007-05-18T19:56:47Z
dc.date.issued 1999-05-01T00:00:00Z en_US
dc.identifier.uri http://hdl.handle.net/1993/1738
dc.description.abstract Object-Oriented database systems (OODBs) are emerging as the most likely candidate to meet data management requirements of new complex applications. Object-Oriented views have been recognized as a powerful mechanism for customizing the structural as well as behavioral aspects of OODBs interfaces for diverse user needs. They are used to provide data independence, authorization enforcement, integration of heterogeneous and distributed systems and efficient update mechanisms. In this thesis, a uniform capacity-augmenting view mechanism for the TIGUKAT object model is presented. Following the uniform semantics of the TIGUKAT object model, two new types, T-virtualtype and T-view, are added into the primitive type system and the behaviors defined on them are given. The capacity-augmenting virtual type, T-virtualtype, can restructure base types and augment the storage capacity of base types by incorporating additional behaviors. A view is defined as a user-selected subschema of the global schema with internal and external aspects. We extend the TIGUKAT defini ion language and query language to define virtual types and view schema. To integrate virtual types into a consistent type lattice, a type integration algorithm based on the TIGUKAT axiomatic model of dynamic schema evolution is developed. en_US
dc.format.extent 5034164 bytes
dc.format.extent 184 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language en en_US
dc.language.iso en_US
dc.title A uniform view mechanism for the TIGUKAT objectbase en_US
dc.degree.discipline Computer Science en_US
dc.degree.level Master of Science (M.Sc.) en_US


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