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Since the web has evolved as a service provider in all areas, there are few problems which are to be handled. Some challenges faced by web services are related to security, quality of service and composition. Among all the challenges, web service composition turns out to be an area of major research, because it supports business-business or enterprise application integration. With the emergence of semantic web the scope for semantic based web services composition increases as it provides better results compared to the traditional method of discovering candidate services for composition. Along with the semantics the nature of composition also needs to be dynamic as the web services and its parameters are changing frequently.
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