4. The method of claim 3 , wherein the usage data comprises one or more of the following: a record of user-selected areas, keywords and keyword scores for words in the user-selected areas, search results clicked on by the user, bookmarks created by the user based upon the search results, notes made by the user based upon the search results, a time period a user spends on each page of the electronic document, or a date and time each area is selected by a user.
3. The method of claim 1 , further comprising collecting usage data related to the user of the electronic document.