Taverna and Workflows in the Virtual Observatory

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Abstract

Taverna (see http://taverna.sourceforge.net) has been developed by the BioInformatics community Ã?? where it is now well established in use. The European Southern Observatory (ESO) has used Taverna as the basis for its Reflex workflow system. ESO aim to utilise Reflex in implementing data reduction pipelines specifically tailored for a range of their instruments on the VLT and other ESO telescopes. This poster will discuss how AstroGrid have developed a plug-in adaptor for Taverna, thereby exposing the standard range of VO services (thus SIAP, SSAP, TAP, CEA-Common Execution Architecture) to Taverna. Taverna is then used both as the graphical workflow builder and as the workflow enactment engine. We note how that currently the enactment engine is a client side application (Taverna 1.5) but that AstroGrid is working with the Taverna development team in enabling a server based enactment engine capability as of the Taverna 2.0 release (2008). A number of workflows, for instance to search multiple remote data archives, return results, cross match the tables, have been implemented as Taverna workflows. The poster will show how the AstroGrid Taverna implementation is being integrated into the new AstroGrid VO Desktop.

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taverna

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