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Metis Workflow System

Metis Workflow System. Kenneth M. Anderson University of Colorado, Boulder. Workflow in Digital Libraries. Digital Library workflows are the processes used by the stakeholders of a digital library librarians, authors, editors, reviewers, students, etc. to coordinate their shared activites

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Metis Workflow System

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  1. Metis Workflow System Kenneth M. Anderson University of Colorado, Boulder

  2. Workflow in Digital Libraries • Digital Library workflows are the processes used by the stakeholders of a digital library • librarians, authors, editors, reviewers, students, etc. • to coordinate their shared activites • such as reviewing new submissions, indexing the current collection, etc.

  3. Problems • However, most digital libraries do not provide workflow services to their stakeholders • As such, most workflows are performed in an ad hoc manner • Furthermore, traditional workflow systems make assumptions that just do not hold in the digital library context, such as: • All stakeholders belong to the same organization • All stakeholders have the same working styles • All stakeholders use the same computing platform

  4. The Metis Approach • The Metis workflow system has been designed to address the workflow needs of the digital library domain • Event-based workflows • Workflows are defined in terms of shared, community-defined events • Each stakeholder can specify their actions/responsibilities with respect to an event independently • Web-based • Metis provides access to workflow services via a Web browser to humans and via an XML-RPC API to programs

  5. The Metis Architecture

  6. Metis Tools • Events and workflows are defined using servlets; event and workflow definitions are stored as XML files • Actions can be associated with events to help automate event processing • Such as downloading a URL or sending e-mail to a particular person when an event arrives • Active workflows can be monitored with the workflow montior; the execution engine is responsible for registering for events and performing actions when the events arrive • We use an event notification system (Sienna) to distribute events across the Internet

  7. More Information • <http://www-serl.cs.colorado.edu/metis/> • Or, send e-mail to <kena@cs.colorado.edu> • Plus, I have sent a draft copy of a paper describing Metis in more detail to your instructor • Ask him for a copy if you are interested; please do not cite this paper or place it on-line

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