These timings provide another very important measure of article interest, and will also be used to improve the value of predictions given to the user. Finally, when a user takes special action on a news article, such as saving it, or forwarding it, that has a very high probability of indicating that an article is of high interest. When modifying an application to support GroupLens, all of the above information should be collected and sent to the GroupLens server. Managing Pseudonyms GroupLens protects users' privacy by providing each user with an anonymous pseudonym. The pseudonym is unique to each user, but it not traceable back to the real user.
Users have the option of maintaining multiple pseudonyms.
For example, a user may be interested in completely different articles when he is reading news at work than en he is reading news at home. He could maintain two different pseudonyms, each of which would build up a different interest profile. You may wish to have a mechanism to allow a users to easily change their pseudonyms. The GroupLens project provides the source code to a portable C client library with a simple API that handles communication with the GroupLens servers. Please send us mail .