A method for personal query based on role preference ontology

To meet the needs of personal semantic query in information integrated systems, this paper applied role preference ontologies to express the preferences information belonged to different roles. Especially, we focused on self-maintenance of the role preference ontologies. It analyzed the query history of the registered user and calculated the preference weight value of the role preference ontology by using the formula of TFtimesIDF. The role preference ontology composed of a series of conceptions, sub-conceptions, attributions, instances and their preference weight values. Consequently, the system could return the personal semantic query results according to the preference information of the role preference ontologies.