INFORMATION SEARCH METHOD, DEVICE, AND PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM

摘要

An information search device having a character string input means for acquiring the character string from a client, a character string information search means for acquiring information including the character string from an index DB, a similarity degree calculating means for calculating the degree of similarity between the character string and the searched information, and an output means for outputting the searched information in descending order of the similarity degree is provided. In the information search device, the character string information search means includes a means for, when the inputted character string is composed of a plurality of words, searching the index DB containing information on the positions in which a word and the plurality of words appear on the basis of each of the plurality of words for the distance between the positions in which the plurality of words appear. The similarity degree calculating means includes a means for calculating the similarity degree on the basis of the distance between the positions in which the plurality of words appear.