  We present Dynamic Condition Response Graphs (DCR Graphs) as a declarative,
event-based process model inspired by the workflow language employed by our
industrial partner and conservatively generalizing prime event structures. A
dynamic condition response graph is a directed graph with nodes representing
the events that can happen and arrows representing four relations between
events: condition, response, include, and exclude. Distributed DCR Graphs is
then obtained by assigning roles to events and principals. We give a graphical
notation inspired by related work by van der Aalst et al. We exemplify the use
of distributed DCR Graphs on a simple workflow taken from a field study at a
Danish hospital, pointing out their flexibility compared to imperative workflow
models. Finally we provide a mapping from DCR Graphs to Buchi-automata.
