user- Data Science and Classification. Proceedings of the 10th IFCS Conf., page 261--270. Heidelberg, Springer, (July 2006)
- Social Software in der Wertschöpfung, Baden-Baden, Nomos, (2006)
- Informatik 2006 -- Informatik für Menschen. Band 2, volume P-94 of Lecture Notes in Informatics, Bonn, Gesellschaft für Informatik, (October 2006)Proc. Workshop on Applications of Semantic Technologies, Informatik 2006 .
- Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures, page 87-102. Aalborg, Aalborg Universitetsforlag, (2006)
- Proc. First International Conference on Semantics And Digital Media Technology SAMT, volume 4306 of LNCS, page 56-70. Heidelberg, Springer, (December 2006)
