1. Department of Computer Science, The University of Manchester, Oxford Road, Manchester M13 9PL, UK
2. Laboratoire de Recherche en Informatique, CNRS, Université Paris-Saclay, Batiment 650, Université Paris-Sud, 91405 ORSAY Cedex, France
3. Common Workflow Language project, Software Freedom Conservancy, Inc. 137 Montague St STE 380, NY 11201-3548, USA
4. Information Sciences Institute, University of Southern California, Marina Del Rey CA 90292, USA
5. Leibniz Institute of Plant Biochemistry (IPB Halle), Department of Biochemistry of Plant Interactions, Weinberg 3, 06120 Halle (Saale), Germany