Global service space for workflow as a service

Web service has been considered to have a tremendous impact on the web. However, despite the outstanding progress their uptake on a Web-scale has been significantly less prominent than initially anticipated. Isolated service islands without links to related services have hampered service discovery and composition. In this paper, we propose a methodology to connect isolated service islands into global social service network for service composition. First, we will give a definition of the Social Link for connecting isolated services. Then we propose global social service network for service composition. And then based on global social service network, we propose a method to provide users workflow as a service considering node-reduction for better performance. Finally, experiment result shows our approach can provide workflow as a service effectively.