Pattern tree-based XOLAP rollup operator for XML complex hierarchies

Details Pattern tree-based XOLAP rollup operator for XML complex hierarchies Pattern tree-based XOLAP rollup operator for XML complex hierarchies

2011-02-04

arxiv.org/abs/1102.0952v1

International Conference on Machine and Web Intelligence (ICMWI 10), Algiers : Algeria (2010)

Computer Science

Databases

Scientific paper

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.

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