Contextual constraint modeling in Grid application workflows

This paper introduces a new mechanism for specifying constraints in distributed workflows. By introducing constraints in a contextual form, it is shown how different people and groups within collaborative communities can cooperatively constrain workflows. A comparison with existing state-of-the-art workflow systems is made. These ideas are explored in practice with an illustrative example from High-Energy Physics. Copyright © 2005 John Wiley & Sons, Ltd.