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...e a workflow and their descriptions; (iv) factual information about a workflow (its name, owner organization, location, etc.); (v) provenance information such as the workflow’s author and its history =-=[53]-=-. Metadata belonging to the workflow executive summary include: (i) mandatory descriptions of the workflow’s definition (e.g, its URI address, its script, its invocation interface, the types of its in...

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...ow Foundation, 2007). Some science disciplines, in particular bioinformatics, are using BPEL and BPEL-like workflow specifications to orchestrate the services that are available in their communities (=-=Miles et al. 2004-=-; Oinn et al. 2006; Slominski, 2006). Expressing applications as services is not applicable in many scientific disciplines, where performance and scalability are critical and where the service invocat...

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...cified workflows [50,51]. Some science disciplines, especially bioinformatics, are using BPEL and BPEL-like workflow specifications to orchestrate the services that are available in their communities =-=[7,39,52]-=-. Expressing applications as services is not applicable in many scientific disciplines, where performance and scalability are critical and where the service invocation overheads are simply too expensi...