Aspects of the disclosed technology enable a knowledge worker to easily and efficiently develop and maintain a comprehension state of a document collection. One aspect of the technology includes a methods, apparatus, and program products that alter a relationship data structure representing a comprehension...http://www.google.com/patents/US8001157?utm_source=gb-gplus-sharePatent US8001157 - Method, apparatus, and program product for developing and maintaining a comprehension state of a collection of information
