1. An information processing system comprising: a first storage for storing an association information database in which association information is stored, said association information being information indicative of association between a plurality of words or phrases belonging to respective classifications in a one-to-one corresponding manner and wherein said plurality of words or phrases are associated with said classifications and furthermore, said plurality of words or phrases are associated in a direction between said classifications; an information extracting unit, in response to designation of an extraction condition of a user, for extracting partial association information corresponding to said extraction condition from said association information database; a display for visibly outputting a view of network information in accordance with said partial association information, said network information being information in which said plurality of words or phrases elements belonging to said classifications are associated with said classifications to form a network that includes said network information, wherein said view of network information visibly output on said display comprises 1) a plurality of said classifications, 2) a plurality of sets of words or phrases that correspond in a one-to-one manner to said plurality of said classifications, 3) a visual marker that illustrates that said plurality of words or phrases are associated in said direction between said classifications; a designating unit for designating a word or phrase in response to an input of a user in said view of said network information; and an element input unit for inputting a first set of plurality of words or phrases designated by said designating unit as a second set of plurality of words or phrases constructing a piece of report data according to a predetermined report model.