Text sentence search device and text sentence search program

摘要

PPROBLEM TO BE SOLVED: To provide a text sentence search device, a text sentence search method, and a text sentence search program for searching for a text sentence with high precision while taking semantic content of the text sentence into consideration. PSOLUTION: A word sectioning/word class giving part 14 sections a query text sentence into words and gives each of them a word class. A syntax/meaning analysis part 16 analyzes a semantic chunk, a center word, and a case of the query text sentence based on the word sectioning/word class giving data. A feature quantity generation part 18 sets a semantic chunk weight and a center word weight and generates semantic vector feature quantity of the query text sentence by using these weights, the word sectioning/word class giving data, a DF value of the text query text sentence among DF values of the words stored in a statistic data storage part 20, and the like. A similarity calculation part 22 calculates similarity between the semantic vector feature quantity of the query text sentence and that of a search object text sentence stored in a database storage part 24 and stores the result in a storage part 26. PCOPYRIGHT: (C)2006,JPO&NCIPI