Data Management

Developments in Spatio-Temporal Query Languages

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Executive Summary

Integrating spatio-temporal data as abstract data types into already existing data models is a promising approach to creating spatio-temporal query languages. In this paper, an important new class of queries can be identified which is concerned with developments of spatial objects over time, that is, queries ask especially for changes in spatial relationships. Based on a definition of the notion of spatio-temporal predicate the authors provide a framework which allows to build more and more complex predicates starting with a small set of elementary ones.

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