Examples include Taverna, Kepler, Triana, Galaxy, Conveyor Pegasus, Pegasys, Gene Pattern, Discovery Net, and OMII-BPEL see for a survey and comparison of some of these tools.Īll such workflow systems typically adopt an abstract representation of a workflow in the form of a directed graph, where nodes represent tasks to be executed and edges represent either data flow or execution dependencies between different tasks. The workflow system maps the edges and nodes in the graph to real data and software components.īased on this abstraction, and through a visual front-end, the user can intuitively build and modify complex applications with little or no programming expertise.
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