Abstract
In today's scenario, there are many web services around the web. This service has its own limited functionality. A single service can not satisfy the users' requests, so we need to combine these services in a set of services. Web service composition uses certain standard protocol to provide these services such as UDDI, SOAP, and WSDL. Reliability of composite web service which is an important aspect. The analysis of reliability in this scenario is not an easy task. In this paper we have proposed a model named Coloured Petri net based Reliability in Composite Web Service (CPN-RCWS). Using this model we compared the reliability under different state of recovery mechanism.
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