KEYWORD EXTRACTION DEVICE AND METHOD, AND DOCUMENT RETRIEVAL DEVICE AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide a keyword extraction technology for presenting a keyword for retrieving a program and a keyword for retrieving the specific story of the program separately.;SOLUTION: An input part 10 extracts a program name and program description (first extraction information) from program information. A class decision part 11 decides each class from the first extraction information, and applies the class number to the first extraction information. An event content extraction part 12 extracts non-common representation and common representation for every class number from the first extraction information with the class number applied thereto. A keyword extraction part 13 extracts each keyword from the non-common representation and the common representation extracted for every class number. A presentation part 14 displays the extracted respective keywords, on a display device separately.;COPYRIGHT: (C)2009,JPO&INPIT