SELECTING AN OPTIMAL PROPERTY OF A KEYWORD ASSOCIATED WITH PROGRAM GUIDE CONTENT FOR KEYWORD RETRIEVAL

An information processing apparatus includes an extracting unit that extracts a plurality of words serving as keywords of content from content information that describes the content, a property dictionary storage unit that stores a property dictionary containing the properties of the words, a property searching unit that searches the property dictionary for the properties of the plurality of words, a property determining unit that determines whether each of the properties of a target word to be processed and selected from among the words serving as keywords matches any of the different words other than the target word among the words serving as keywords or whether each of the properties of a target word matches any of the properties of the different words, and a determination unit that determines the representative property of the target word on the basis of a match count determined by the property determining unit.