Representing Temporal and Factual Uncertainty
The task of an information system is the representation and management of indicative information from multiple sources describing the state of some enterprise. Most snapshot database models represent enterprises that are crisp where all relationships are fixed, and all attributes are atomic valued. In temporal databases, approaches are dealing mainly with precise absolute times. Very few approaches deal with imprecise absolute times or with infinite absolute times. No consideration has been given to imprecise infinite times. Many algebraic models are dealing with temporal or value imperfection, with no description of the semantics of uncertain information. This paper suggests an application independent conceptual framework describing the semantics of temporal and incomplete information and translates this to database representation.
KeywordsEntity Type Relation Schema Fact Type Factual Uncertainty Probability Interval
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