Decision Support Systems - Special issue on WITS '97
An Algebra for Probabilistic Databases
IEEE Transactions on Knowledge and Data Engineering
Supporting Imprecision in Multidimensional Databases Using Granularities
SSDBM '99 Proceedings of the 11th International Conference on Scientific and Statistical Database Management
OLAP over uncertain and imprecise data
The VLDB Journal — The International Journal on Very Large Data Bases
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The probabilistic OLAP model has been presented in this paper. It permits uncertain knowledge to be represented in data warehouse systems. There are two types of uncertainty that can be expressed in this model: imprecise facts and uncertain facts. The former are facts that have occurred but their characteristics are not certain. The latter are facts whose occurrences are uncertain. Typical OLAP algebra operators (set operators, restriction, projection etc.) are included in this model.