SEARCH FORMULA UPDATE DEVICE, SEARCH FORMULA UPDATE METHOD

摘要

Disclosed is a search formula update device capable of updating with high precision a search formula specifying an element of a structured document according to modifications of structure and content. The search formula update device is provided with a partial structure extraction unit (3) for extracting a partial structure from structure information (101); a partial structure detection unit (4) for detecting, among the extracted partial structures, partial structures constituting the structure of the post-update structured document (200); a structure reconstitution unit (5) for combining the detected partial structures to reconstitute structure information (201) of the post-update structured document (200); an objective element estimation unit (6) for estimating an objective element in the post-update structured document (200) on the basis of the detected partial structures and a search formula (102); and a search formula update unit (7) for using the reconstituted structure information (201) to update the search formula (102) so as to specify the objective element in the post-update structured document (200) to generate a search formula (202).