Prior analyses of online communities have applied SNA to blogs [Blo06] or web forums [Hol04]. Both types of communities have in common that the communication links between the users are well-defined: For example, one blog links to another blog or one forum user answers to a question another user has posted.

With our work we assess to what extent the concept of SNA can be applied to a social network that is not represented by communication data which contains well-defined links between the actors in the network. Instead, the existing data had first to be mapped appropriately. In order to do so, we model social ties between actors as co-authorship in an article, in particular between the creator of an article, and its subsequent editors.