Scientific Workflow Development Using Both Visual and Script-Based Representation

In this paper we propose to achieve a semantic equivalence between a visual- and a script-based workflow development paradigm. We accomplish this by building a script language which execution semantics matches an existing sophisticated, data-parallel scientific workflow language and its underlying GUI-based core workflow enactor. It facilitates multiple representations of a scientific workflow while preserving the execution semantics and enactment engine. This development caters to the need of users with different levels of expertise within a single workflow platform. A two-ways representation translator makes it possible to convert any source workflow into its semantically equivalent counter-part, and therefore use a single enactor independently of the user's preferred representation.