In: Daniel Moldt (Ed.): Proc. of the Second International Workshop on Modelling of Objects, Components, and Agents (MOCA'02), Aarhus, Denmark, August 26-27, 2002, pages 1-18. Technical Report DAIMI PB-561, August 2002. Available online: http://www.daimi.au.dk/CPnets/workshop02/moca/papers/.