A method of querying a user profile commences with a first access to a public portion of a knowledge profile for each of a plurality of potential targets of the electronic document, the public portion of each knowledge profile including public knowledge terms indicative of a knowledge base of a potential...http://www.google.com.au/patents/US6205472?utm_source=gb-gplus-sharePatent US6205472 - Method and apparatus for querying a user knowledge profile
