In an E-service environment, workflow involves not only a single organization but also a number of business partners. Therefore, workflow interoperability in such an environment is an important issue for enacting workflows. In this paper, we introduce our approach of using workflow views as a fundamental support for E-service workflow interoperability and for controlled (sub-) workflows visibil...

The mixture of production and ad-hoc aspects in organizational work is a ubiquitous phenomenon which potentially occurs on all levels of detail in a workflow. In this paper I first describe how this problem is addressed in the Object-oriented Activity Support Model. The model supports the manual modifications of the subactivity tree in collaboration with a workflow engine, and it supports the m...

A central problem in workflow concerns optimizing the distribution of work in a workflow: how should the execution of tasks and the management of tasks be distributed across multiple processing nodes (i.e., computers). In some cases task management or execution may be at a processing node with limited functionality, and so it is useful to optimize translations of (sub-)workflow schemas into flo...

This paper presents the CAWE framework for the context-aware management of applications based on the composition of Web Services in complex workflows. We introduce a representation of context-dependent activities based on an abstraction hierarchy which supports the specification of synthetic and clear workflows. Moreover, we propose a framework architecture which enriches the capabilities of a ...

In this paper we propose a Grid Workflow Infrastructure, which serves as the base for specifying and executing collaborative interactive workflows within computational grids. The infrastructure is based on the Open Grid Services Architecture (OGSA) and leverages the concepts of the Business Process Execution Language for Web Services (BPEL4WS). Using OGSA enables us to exploit advanced Grid fea...

In this paper we propose a Grid Workflow Infrastructure, which serves as the base for specifying and executing collaborative interactive workflows within computational grids. The infrastructure is based on the Open Grid Services Architecture (OGSA) and leverages the concepts of the Business Process Execution Language for Web Services (BPEL4WS). Using OGSA enables us to exploit advanced Grid fea...

We describe a provenance model tailored to scientific workflows based on the CollectionOriented Modeling and Design paradigm. Our implementation within the Kepler scientific workflow system captures the dependencies of data and collection creation events on preexisting data and collections, and embeds these provenance records within the data stream. A provenance query engine operates on self-co...

While workflow is playing an increasingly important role in eScience, current systems lack support for the collection of provenance data. We argue that workflow provenance data should be automatically generated by the enactment engine and managed over time by an underlying storage service. We briefly describe our layered model for workflow execution provenance, which allows navigation from the ...

Workflow management systems (WFMSs) are systems that generate, coordinate and monitor tasks performed by human workers in collaboration with automated (information) systems. The iTask system (iTasks) is a WFMS that uses a combinator language embedded in the pure and lazy functional language Clean for the specification of highly dynamic workflows. iTask workflow specifications are declarative in...

For the shortcomings of the traditional workflow in flexibility, this paper analyzes the advantages of Role Based Access Control Technology (RBAC) in realizing procedure permission dynamic management. With RBAC applied in it, this paper also constructs the flexible workflow model of Role Based Access Control and gives out the definition of the engine as well as the components concerned. In addi...