A. Gudelj, M. Krcum, and Z. Juric (Croatia)
databases, temporal data model, ATSQL2, query language
Conventional databases represent the state of an enterprise at a single moment of time. They support modification operations which facilitate the transition from one consistent database state to another. For queries, they assume that all facts stored in the database are valid at the time instant a query is evaluated. There exist many application domains where it is needed to reconstruct earlier database states or even store future database states in parallel. The different database states are stored as temporal data. This paper shows one approach to managing temporal data, along with the corresponding prototype implementations.
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