Data sorting, data sorting tree creating, derivative extracting and thesaurus creating apparatus and method, or data processing system

摘要

Derivatives representing character string candidates are created from a list of examples of character data. The sorting attribute of the derivatives representing character string candidate is evaluated relating to each example of the character data and a derivatives representing character string is labeled to an internal node. At the same time, the sorting attribute of the derivatives representing character string selected is evaluated relating to each example of the character data to thereby successively sort the example of each character data and create a data sorting tree. New character data is sorted using the data sorting tree. On the other hand, a thesaurus of desired character data is automatically created as a word linked to the derivatives representing character string which is labeled to each internal node present on a path extending along the data sorting tree, or as a word linked to a negative of the derivative representing character string.