XPATH PROCESSOR, XPATH PROCESSING METHOD, XPATH PROCESSING PROGRAM AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To select optimum summary information for accessing XML (eXtensible Markup Language) data.

SOLUTION: This XPath processor accessing the XML data suitable for inquiry described by an XPath expression has: a summary information production means 12 producing a plurality of combinations of summary information of the XML data and statistical information of the summary information, and storing them into a storage means; an inquiry analysis means 14 performing retrieval processing of the inquiry to the summary information of the XML data in each the summary information, and extracting the statistical information of the summary information matching the retrieval processing; and an access selection means 20 evaluating each the extracted statistical information by an evaluation function for heightening the evaluation as an access amount to the XML data is reduced, and selecting the summary information having the high evaluation to access the XML data.

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