Temporal and Spatio-Temporal Data Models and Their Expressive Power

摘要: Currently, there are strong efforts to integrate spatial and temporal database technology into spatio-temporal systems. This paper views the topic from a more fundamental perspective makes several contributions. First, it reviews existing data models presents completely new approach modeling based on very general notion of objects. The definition objects is centered around observation that anything changes over time can be expressed as function time. For well known concept types employed. As specific subclasses, linear identified. Second, proposes embedding by means abstract type (ADT) integration complex databases. In technology, have already been successfully integrated ADTs for attributes in relational schemas while now. Furthermore, we make statements about expressive power different embeddings. Third, consider combination (relational) We explain various alternatives databases compare their power. Spatio-temporal turn out instances