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Essay Details:
Essay text:
In this
context, it is necessary to allow OLAP analyses over XML
data cubes(XOLAP).Thus,XQuery extensions are needed.
To help define a formal framework and allow much-needed
performance optimizations on analytical queries expressed
in XQuery, having an algebra at one’s disposal is desirable.
However, XOLAP approaches and algebras from the literature
still largely rely on the relational model and/or only
feature a small number of OLAP operators. In opposition,
we propose in this paper to express a broad set of OLAP
operators with the TAX XML algebra.
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