Patent ID: 6985908

Claim:
A text classification system, comprising: a table storage means for storing a priority correspondence table, a regular correspondence table and an auxiliary correspondence table, each indicating a correspondence between keywords and categories; a table input means for inputting the correspondence tables from the table storage means; a text storage means for storing a plurality of texts; a text input means for inputting a text from the text storage means; a keyword extraction/counting means for extracting keywords included in the correspondence tables from the text obtained from the text input means and counting how many of those keywords are included; and a category determination means that, when there is a keyword included in the priority correspondence table whose occurrence count is not zero, determines at least a category corresponding to the keyword with the maximum occurrence count as an assignment category; when the occurrence count of all keywords included in the priority correspondence table is zero and when there is a keyword included in the regular correspondence table whose occurrence count is not zero, determines at least the category corresponding to the keyword with the maximum occurrence count as the assignment category; when the occurrence count of all keywords included in the priority correspondence table and the regular correspondence table is zero and when there is a keyword included in the auxiliary correspondence table whose occurrence count is not zero, determines at least the category corresponding to the keyword with the maximum occurrence count as the assignment category.