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Characterization of Hierarchies and Some Operators in OLAP Environment.

Elaheh Pourabbas, Maurizio Rafanelli: Characterization of Hierarchies and Some Operators in OLAP Environment. DOLAP 1999: 54-59
@inproceedings{DBLP:conf/dolap/PourabbasR99,
  author    = {Elaheh Pourabbas and
               Maurizio Rafanelli},
  title     = {Characterization of Hierarchies and Some Operators in OLAP Environment},
  booktitle = {DOLAP '99, ACM Second International Workshop on Data Warehousing
               and OLAP, November 6, 1999, Kansas City, Missouri, USA, Proceedings},
  publisher = {ACM},
  year      = {1999},
  pages     = {54-59},
  ee        = {db/conf/dolap/PourabbasR99.html, http://doi.acm.org/10.1145/319757.319790},
  crossref  = {DBLP:conf/dolap/99},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

Recently numerous proposals for modelling and querying Multidimensional Databases (MDDB) are proposed. Among the still open problems there is a rigorous classification of the different types of hierarchies. In this paper we propose and discuss some different types of hierarchies within a single dimension of a cube. These hierarchies divide in different levels of aggregation a single dimension. Depending on them, we discuss the characterization of some OLAP operators which refer to hierarchies in order to maintain the data cube consistency. Moreover, we propose a set of operators for changing the hierarchy structure. The issues discussed provides modelling flexibility during the scheme design phase and correct data analysis.

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