A new web application development methodology: Web service composition

Traditional methodology for web application development can not fully satisfy the requirement raised by web services. Generally, distributed web applications are built on top of 3-tier client/server model, which is a relatively static environment that can provide reliable static service binding. However, in the web service-oriented environment, service binding is dynamic and just-in-time. How to enable the composition among the web services has become a key area in the software engineering research. In this paper, we present a new methodology for web application development, which is a framework that facilitates the visual design, validation and development of web service composition. The framework is mainly based on Web Service Composition Graph (WSCG), the underlying formalism for web service compositions. Using graph grammar and graph transformation defined on WSCG, the static topological structure of a web service composition can be described and the automation of the constructed web service composition is also facilitated.