Realizing a temporal complex-object data model

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Abstract
Support for temporal data continues to be a requirement posed by many applications such as VLSI design and CAD, but also in con- ventional applications like banking and sales. Furthermore, the strong demand for complex-object support is known as an inherent fact in design applications, and also emerges for advanced "conven- tional" applications. Thus, new advanced database management systems should include both features, i.e. should support temporal complex-objects. In this paper, we present such a temporal com- plex-object data model. The central notion of our temporal com- plex-object data model is a time slice, representing one state of a complex object. We explain the mapping of time slices onto the complex objects supported by the MAD model (which we use for an example of a non-temporal complex-object data model) as well as the transformation process of operations on temporal complex- objects into MAD model operations. Thereby, the basic properties of the MAD model are a prerequisite for our approach. For exam- ple, time slices can only be directly stored, if non-disjunct (i.e. over- lapping) complex objects are easily handled in the underlying com- plex-object data model.

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