On-Line Social Relatoinships illustrated
Some social networking sites, like Facebook or MySpace, require a confirmation when a user wishes to list another user as a “friend”. Other sites, like LiveJournal for example, do not impose this requirement. This “one way” relationship is usually referred in terms of FOAF as “knows”. There are no restriction on reciprocal “knows”. In my opinion, groups of users with mutual reciprocal ties can be considered as “friends” as well. How else would you define a group in the center of the diagram below?
