DOCUMENT SEARCH DEVICE, DOCUMENT SEARCH METHOD, AND DOCUMENT SEARCH PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a document search device capable of rapidly searching for documents about things currently in conversation according to situations.

SOLUTION: A document search device comprises: a situation analysis part 1 which analyses situations such as a place or a date in input documents; a search index creation part 2 which creates a search index including the situations; a feature word extraction part 3 which extracts feature words from the documents in the situations according to distances from the situations; a feature word index creation part 4 which creates a feature word index for searching for the extracted feature words from a situation input in searching for documents; a situation input part 5 which inputs a situation specified by an user; a feature word presentation part 6 and a feature word input part 7 which select feature words about the input situation referring to the feature word index; and a search result acquisition part 8 which searches for documents about the input situation and the selected feature words referring to the search index.

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