ADDITIONAL RETRIEVAL WORD CANDIDATE PRESENTING METHOD, DOCUMENT RETRIEVING METHOD AND DEVICES THEREFOR

摘要

PROBLEM TO BE SOLVED: To obtain a proper retrieval result by a reretrieval by picking up the word existing in the document obtained by the retrieval for which a prescribed retrieval condition is used and presenting the picked up word as the candidate of a new retrieval word to be added at the retrieval of the next time. SOLUTION: A memory 11 for retrieval word is a storage part storing a prescribed retrieval word. The prescribed retrieval word is stored to be taken out when the prescribed retrieval word is made AND or OR with an additional retrieval word in the second and succeeding retrievals. A control part 10 is a word pickup means picking up the word existing in the document obtained by the retrieval for which a prescribed retrieval condition is used. An additional retrieval candidate presenting means 20 presents the picked up word as the candidate of a new retrieval word to be added at the retrieval of the next time. Thus, a user can easily acquire truly necessary information in short time.