Abstract
A Web service is a collection of open protocols and standards for exchanging data between applications and system. Web services are platform independent and in today’s internet, web services play a vital role, single service is not sufficient to respond to user’s goal. To achieve the specific goal of the user, we need to combine one or more web services through the web service composition technique. Now a day’s tools and environment that facilitates the composition of atomic web services into more complex web process is required. Here, to orchestrate the web service, first atomic web service among group of services is selected that must fulfil the user’s requirement, transactional and Quality of Service (QoS) characteristics. Traditionally QoS based web service composition does not consider the transactional constraints during orchestration process. Therefore this paper deals with the issue of selecting and composing web services using user agent and web services agent not only according to their user requirement but also to their transactional and QoS (TQoS) properties.
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