I describe a Workflow Management System, where the workflow engine is implemented inside a database. The focus here is on the architectural approach and on the lessons learned from a commercial implementation in the workflow component of the Informix Media 360 content management solution. Conceptually, the two main primitives of workflow are activities, which represent the work items of a large...

The data mining field is an important source of large-scale applications and datasets which are getting more and more common. In this paper, we present grid-based approaches for two basic data mining applications, and a performance evaluation on an experimental grid environment that provides interesting monitoring capabilities and configuration tools. We propose a new distributed clustering app...

Processing documents is a critical and crucial aspect for enterprises. The management of documents involves several people and can be a long and time-wasting process. We developed a document workflow engine based on email paradigm. Exploiting a web application, the subject of the workflow, the document, can be sent as an email attachment. Our solution overcomes the current limitation in the use...

The increasing ability for the sciences to sense the world around us is resulting in a growing need for data driven applications that are under the control of workflows composed of services on the Grid. The focus of our work is on provenance collection for these workflows, necessary to validate the workflow and to determine quality of generated data products. The challenge we address is to reco...

Workflows offer a powerful way to describe and deploy applications on grid infrastructures. Many workflow management systems have been proposed but there is still a lack of a system that would allow both a simple description of the dataflow of the application and an efficient execution on a grid platform. In this paper, we study the requirements of such a system, underlining the need for well-d...

In this paper, we present the architecture of XRL/Flower. XRL/Flower is a software tool, which benefits from the fact that it is based on both XML and Petri nets. Standard XML tools can be deployed to parse, check, and handle XRL documents. The Petri-net representation allows for a straightforward and succinct implementation of the workflow engine. XRL constructs are automatically translated in...

Electronic workflow facilitates transactions between systems and enterprises. In this paper we employ socio-cognitive theory and technologies in the context of an agent-based workflow engine to facilitate partner selection and build trust among electronic workflow participants. These elements form useful and effective additions to the workflow context, by capturing business policy aspects. We p...

For the First Provenance Challenge, we introduce a layered model to represent workflow provenance that allows navigation from an abstract model of the experiment to instance data collected during a specific experiment run. We outline modest extensions to a commercial workflow engine so it will automatically capture provenance at workflow runtime. We also present an approach to store this proven...