IMPORTANT WORD EXTRACTION DEVICE, IMPORTANT WORD EXTRACTION METHOD AND IMPORTANT WORD EXTRACTION PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide an important word extraction technology for selecting an important word on the basis of other than appearance frequencies. PSOLUTION: Important word candidates which are collocations of one or more nouns or proper nouns are extracted from an input text. Action expression which appears in describing an action of an input text creator is extracted as a feature word from the input text. One or more features showing the property of the important word candidates are extracted with respect to each important word candidate. An importance score is calculated using the features on the basis of a classification rule determined beforehand by machine learning, and the important word is determined from the importance score. In extracting the features, modification structure information showing whether the features are the important word candidates concerning the action expression is added to the important word candidates as the features. PCOPYRIGHT: (C)2011,JPO&INPIT