* Note: The information in this file is outdated. According to * , the trial of the * collaborative filtering system for Usenet is finished. * Chris Siegler told me he had a working implementation * of a BBB server. Although it's currently not online, I'll keep GroupLens * support in slrn for now. The GroupLens support should work on most Unix systems. It may even work for OS/2 or VMS. For information about GroupLens, see http://www.cs.umn.edu/Research/GroupLens/trial.html Edit src/slrnfeat.h to enable support for GroupLens, The next step is to create a file called .grplens in your home directory. This file must contain lines such as: PSEUDONYM your-pseudonym BBBHOST grouplens.cs.umn.edu BBBPORT 9000 comp.os.linux.misc . . rec.food.recipes rec.arts.movies.current-films The last lines in the file consist of newsgroup names. See http://www.cs.umn.edu/Research/GroupLens/trial.html for information about which groups are supported. The PSEUDONYM line must contain a registered pseudonym. To register a pseudonym, see http://www.cs.umn.edu/Research/GroupLens/trial.html for a registering link. Once you have created your .grplens file with a registered pseudonym, you need to add the line set use_grouplens 1 to your .slrnrc file. After doing that, simply run slrn. When you enter a supported newsgroup, slrn will retrieve rating for the newsgroup from the GroupLens server and display the ratings in the header summary window. The display format is set via the DISPLAYTYPE line in your .grplens file. Again, see the GroupLens web page for supported DISPLAYTYPE or look at the documentation in the GroupLens library directory. To rate articles that you have read, simply press `0' followed by an integer `1' through `5' where `1' is a low rating and `5' is a high rating. After leaving the newsgroup, slrn will send your ratings back to the GroupLens server. Note: Only those newsgroups that the GroupLens server supports which are also listed in your .grplens file may be rated. The header display in a group for which GroupLens ratings have been requested, will include a ratings field. The ratings field will either consist of one or more `*' characters, or a `?'. The `?' means that there is no GroupLens information for the article for which the header refers. Articles for which GroupLens information is available will contain one or more `*' characters on the header lines to indicate a rating of 1 to 5.