Samenvatting

In this paper the authors describe the iTasks workflow system. The iTasks system is a software library written in the declarative programming language Clean, which allows for the highlevel specification of multi-user workflows. An important advantage of the iTasks system above commercially available workflow systems is that it is not a special purpose system, but embedded in a general purpose programming language which allows the user a much higher degree of freedom to specify complex tasks and actions within these tasks. For example, in the iTasks system it is possible to specify workflows where new tasks are dynamically dependent or created on the results of previous tasks. The system also allows for easy and flexible encryption of the information exchanged between partners.