ing Object Interactions Using Composition Filters Mehmet Aksit 1 , Ken Wakita 2 , Jan Bosch 1 , Lodewijk Bergmans 1 and Akinori Yonezawa 3 1 TRESE project, Department of Computer Science, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. email: {aksit, bosch, bergmans}@cs.utwente.nl 2 Department of Information Science, Tokyo Institute of Technology, 2-12-1 Ohokayama, Meguro-ku, Tokyo, 152, Japan. email: wakita@is.titech.ac.jp 3 Dept. of Information Science - Faculty of Science- University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113 Japan. email: yonezawa@is.s.u-tokyo.ac.jp Abstract It is generally claimed that object-based models are very suitable for building distributed system architectures since object interactions follow the clientserver model. To cope with the complexity of today's distributed systems, however, we think that high-level linguistic mechanisms are needed to effectively structure, abstract and reuse object interactions. For example, the...