Bachmann, AlexanderFunk, BurkhardtSchroeder, Ulrik2017-11-222017-11-222010978-3832525781https://dl.gi.de/handle/20.500.12116/7351Web based groupware solutions that support the creation of communities of practice or ad hoc collaboration have become an essential part of computer supported collaborative work. Online groupware systems often combine communication, document sharing and document-creation features. Even though groupware is actively used for knowledge management purposes by organizations and individuals, research contributions in the fields of knowledge retrieval and expertise location have yet to be included. In this paper we introduce YouCallo, a web based collaboration platform that makes extensive use of groupware, social network and knowledge management technologies. The system uses collaborative filtering and information retrieval technologies to deliver relevant resources and potential experts to groupsenText/Conference Paper