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The performance of XPath evaluation significantly affects XML applications, while the popularity of multi-core environment provides the great opportunity for performance improvement through parallel computing. A novel parallel XPath evaluation method named pM2 (parallel Matrix Match), which is based on node relation matrix, is proposed in this paper. It has two main stages includes parallel relation matrix construction and parallel query. Node relation matrix of XML dataset is constructed according to region codes beforehand, while parallel query is realized by using parallelized query primitives. The navigate feature of pM2 makes it easy to implement complete semantics of XPath. Iterative processes in matrix construction and query primitives are optimized in data parallelism style. Experiments show pM2 is a practical XPath evaluation method with good performance. © 2013 Binary Information Press.
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