Web Services Technology and Learning Technology- A Web-Services Model for Constructing Decentralized Virtual Learning Environments

摘要

Web Services technology is a dazzling star in distributed computing technology, which provides a new way to integrate existing systems or applications, and the ability to access data in a heterogeneous environment. In this paper, we give a definition of the term "Web Services", describe and analyse its categories and characteristics. A Web-services Management Architecture is then defined based on Web Services Architecture, Workflow management and Sun ONE (Open Network Environment) Architecture. Design issues are represented and analyzed, such as how to design Web-services metadata, to create Web-services packages. The application of this work in the area of learning technology to make learning on the Web more efficient, we integrate Web Services technology within learning technology, which offers a powerful solution in response to the current challenges in virtual learning environments. The result of this integration is a high-level Web-services model for both client/server and Peer-to-Peer frameworks for constructing decentralized, virtual-learning environments. The interoperable system components are defined and designed in this model.