A system and method for automated populating of an existing concept hierarchy of items with new items, using entropy as a measure of the correctness of a potential classification. User-defined concept hierarchies include, for example, document hierarchies such as directories for the Internet, library...http://www.google.de/patents/US7320000?utm_source=gb-gplus-sharePatent US7320000 - Method and apparatus for populating a predefined concept hierarchy or other hierarchical set of classified data items by minimizing system entrophy