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E. Malinowski and E. Zimányi. OLAP Hierarchies: A Conceptual Perspective. In Proceedings of the 16th International Conference on Advanced Information Systems Engineering, CAiSE'04, number 3084 in Lecture Notes in Computer Science, pages 477-491, Riga, Latvia, June 2004. Springer-Verlag.
© Springer-Verlag 2004 – http://dx.doi.org/10.1007/b98058

Abstract

OLAP (On-Line Analytical Processing) tools support the decision-making process by giving users the possibility to dynamically analyze high volumes of historical data using operations such as roll-up and drill-down. These operations need well-defined hierarchies in order to prepare automatic calculations. However, many kinds of complex hierarchies arising in real-world situations are not addressed by current OLAP implementations. Based on an analysis of real-world applications and scientific works related to multidimensional modeling, this paper presents a conceptual classification of hierarchies and proposes graphical notations for them based on the ER model. A conceptual representation of hierarchies allows the designer to properly represent users' requirements in multidimensional modeling and offers a common vision of these hierarchies for conceptual modeling and OLAP tools implementers.


Updated: 2017-03-27