Information classifying system that discovers the hierarchical structure of keywords by comparing link numbers

摘要

A system classifies the information added with keywords by discovering the hierarchy relation with respect to all of keywords. There is generated a relation composed of a total link number and links to other keywords and information, each for keyword. The total link numbers of two relations with links are compared with each other thereby determining a high level relation having a larger total link number and a low level relation having a lower total link number, and a hierarchy structure can be discovered by making the link from the low level relation to the high level relation ineffective.