Abstract: An information processing apparatus includes an acquisition unit that acquires an information group in which an abbreviated name is used, a specification unit that specifies a position where the abbreviated name is used in the information group from a type of information group acquired, a first extraction unit that extracts the abbreviated name from the specified position, a second extraction unit that extracts a formal name on the basis of a character related to the information group, and an association unit that associates the abbreviated name and the formal name with each other.

Abstract: An information processing apparatus includes a first extraction unit, a second extraction unit, and a notification unit. The first extraction unit extracts tags which co-occur in a document. The second extraction unit extracts a co-occurrence probability or an expected value of the number of co-occurrences of the co-occurring tags extracted by the first extraction unit from a co-occurrence probability or an expected value of the number of co-occurrences between the tags which is calculated with respect to a document which has already been tagged. The notification unit notifies that the co-occurring tags extracted by the first extraction unit are abnormal based on the co-occurrence probability or the expected value of the number of co-occurrences extracted by the second extraction unit.