| 摘要 |
PROBLEM TO BE SOLVED: To efficiently retrieve desired data from a structured document file according to an incomplete path expression. SOLUTION: A document retrieval apparatus for retrieving desired data from a structured document file is disclosed. The apparatus retains index information in which a set of tags in a hierarchical relationship in the structured document file are associated with one or more positions containing the set of tags in part of the path expression. When accepting the input of a partial path expression, the apparatus refers to the index information and specifies, as candidate positions for a position to be retrieved, positions where the set of tags included in the partial path expression appears as part of the path expression. COPYRIGHT: (C)2008,JPO&INPIT
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