RWTH Aachen University
A DataWarehouse (DW) is a data repository that integrates data from multiple sources and organizes the data according to a set of data structures called dimensions. Each dimension provides a perspective upon which the data can be viewed. In order to support an efficient processing of queries, a dimension is usually required to satisfy different classes of integrity constraints. In this paper, the authors study the problem of repairing a dimension when it fails to satisfy a set of two classes of integrity constraints: strictness constraints and covering constraints.