7. The method of claim 1 , further comprising: determining whether each of the one or more first documents is included in a first website linked to by a second website, the second website associated with a topic included in the interest profile of the user.
7. The method of claim 1 , further comprising: determining whether each of the one or more first documents is included in a first website linked to by a second website, the second website associated with a topic included in the interest profile of the user. 8. The method of claim 7 , wherein the boost value is based on a number of links from the second website to the first website.