| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform processing of evaluating a search expression at high speed by using differential information given, in information extraction processing by search expression evaluation from a structured document. <P>SOLUTION: A search expression 111 registered beforehand is classified into a simple structural expression, an expression with predicate, a complex expression, and the like and registered to a search expression table 108, the search expression is applied to an original document 112 registered beforehand, and its application result and calculation process information are calculated, and registered to an original document table 109. When the differential information 113 is input, it is analyzed by a differential analysis part 104 and classified into either a value difference or structure difference, and in accordance with combination of the kind of differential information 113 and the kind of search expression, the search expression is evaluated by using the differential information 113 and the calculation process information by a differential search expression evaluation part 105 when differential calculation is possible; otherwise, a structured document is restored by a full-text search expression evaluation part 106 and the search expression is evaluated. <P>COPYRIGHT: (C)2008,JPO&INPIT |
