Temporal Attributes: Status and Subsumption

Provided by: Australian Computer Society Topic: Data Management Date Added: Jan 2015 Format: PDF
Representing data that changes over time in conceptual data models is required by various application domains and requires a language that is expressive enough to fully capture the operational semantics of the time-varying information. Temporal modelling languages typically focus on representing and reasoning over temporal classes and relationships, but have scant support for temporal attributes, if at all. This prevents one to fully utilize a temporal conceptual data model, which, however, is needed to model not only evolving objects (e.g., an employee's role), but also its attributes, such as changes in salary and bonus payouts.

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