5. The method of claim 1 including determining whether the electronic document is indicated by the first user as being for use in construction of the user knowledge profile.
5. The method of claim 1 including determining whether the electronic document is indicated by the first user as being for use in construction of the user knowledge profile. 6. The method of claim 5 wherein the determining comprises examining a flag associated with the electronic document, the flag marking the electronic document as being for use in the construction of the user knowledge profile of the first user.