ABSTRACT
Today Web is no more a collection of pages but a collection of services which can be collaborated over the Internet. Composition is a process of combining two or more Web services together in order to fulfill the request. Web Services are created and updated dynamically at run time hence it is not possible to derive service compositions manually. Semantics is used to automate and wire services. This paper presents the need and issues involved in semantic based Web service composition. It also provides an overview of contemporary research initiatives towards the same. The generic framework for semantic service composition has been provided in this paper and the languages which support Services compositions are compared with respect to several parameters.
