Pattern tree-based XOLAP rollup operator for XML complex hierarchies

Marouane Hachicha (1) , Jérôme Darmont (1)

1 ERIC - Equipe de Recherche en Ingénierie des Connaissances

With the rise of XML as a standard for representing business data, XML data warehousing appears as a suitable solution for decision-support applications. In this context, it is necessary to allow OLAP analyses on XML data cubes. Thus, XQuery extensions are needed. To define a formal framework and allow much-needed performance optimizations on analytical queries expressed in XQuery, defining an algebra is desirable. However, XML-OLAP (XOLAP) algebras from the literature still largely rely on the relational model. Hence, we propose in this paper a rollup operator based on a pattern tree in order to handle multidimensional XML data expressed within complex hierarchies.

Domaines: Base de données [cs.DB]

Marouane Hachicha, Jérôme Darmont. Pattern tree-based XOLAP rollup operator for XML complex hierarchies. International Conference on Machine and Web Intelligence (ICMWI 10), Oct 2010, Algiers, Algeria. ⟨hal-00563233⟩