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Issue No. 09 - September (2009 vol. 21)
ISSN: 1041-4347
pp: 1328-1342
Dirk Müller , University of Paderborn, Paderborn
Jinghua Groppe , University of Lübeck, Lübeck
Sven Groppe , University of Lübeck, Lübeck
ABSTRACT
Caching stores the results of previously answered queries in order to answer succeeding queries faster by reusing these results. We propose two different approaches for using caches of XSLT transformed XML data in order to answer queries. The first approach checks whether or not a current query Q can be directly answered from the result of a previously answered query Qi stored in the cache. The new query is otherwise submitted to the source over the network, the answer of the query is determined, transmitted back to the client, and stored in the cache. The second approach determines only the intersection Q−Qi and integrates the result of Q−-Qi into the previous results in the cache, which requires applying a numbering scheme for the output of the XSLT stylesheet. We show by experimental results that the second approach can significantly speed up the answering time in comparison to the first approach, but is not significantly slower in few worst cases than the second approach.
INDEX TERMS
Database management, cache, XML, XSLT, XPath.
CITATION
Dirk Müller, Jinghua Groppe, Sven Groppe, "Result Merging Technique for Answering XPath Query over XSLT Transformed Data", IEEE Transactions on Knowledge & Data Engineering, vol. 21, no. , pp. 1328-1342, September 2009, doi:10.1109/TKDE.2008.211
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