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1994
Technical report TR94-06. Object-oriented computing is influencing many areas of computer science, including database systems. Despite many advances, object-oriented computing is still in its infancy and a universally accepted definition of an object-oriented model is virtually nonexistent. In
of objects, defines a clear separation between primitive components, and incorporates a uniform semantics over objects. A behavioral model definition specifies the semantics of objects and this is integrated with a structural model to form a complete model definition. The meta-model is uniformly
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Temporality in Object Database Management Systems
1998
Technical report TR98-04. Conventional databases represent the state of an enterprise at one particular point in time. That is, they contain only current data. As a database changes, out-of-date information, representing past states of the enterprise, is discarded. However, temporal support is a
requirement posed by many database applications, such as office information systems, engineering databases, and multimedia systems. Most of the research on modeling time has concentrated on the definition of a particular temporal model and its incorporation into a (relational or object-oriented) database