  A practical and promising approach to parallelizing XPath queries was
proposed by Bordawekar et al. in 2009, which enables parallelization on top of
existing XML database engines. Although they experimentally demonstrated the
speedup by their approach, their practice has already been out of date because
the software environment has largely changed with the capability of XQuery
processing. In this work, we implement their approach in two ways on top of a
state-of-the-art XML database engine and experimentally demonstrate that our
implementations can bring significant speedup on a commodity server.
