According as XML data have been prevailing in many areas such as internet and public documentation, we need to research data mining algorithm to XML data. And many kinds of techniques have been researched to speed up the query performance about XML data. In this paper, therefore, as the method for speeding up the query performance we analyze the XML query pattern and propose Weighted- FP-growth algorithm extracting the similar XML query pattern fast. The proposed method is applied to XML query subtrees. And we experimented our method compared with the existing algorithm. And we showed the proposed method outperform the other methods and give the fast query result to the repeatedly occurring queries.
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