Introduction of Web Services

Web services can be published and can be accessed with internet and business intranets for developing scattered applications. It can be defined as the model for software system and designed to maintain interoperable communication. The capacity to select and compose the inter-organizational and mixed services at runtime on the web is the important issue to be considered in web service applications. With the help of a single web service, we cannot satisfy both the functional and non-functional requirements of the user, so we need to mix a set of composite already existing web services to satisfy the user needs. Definition of Web Services “A web service is a software system that supports interoperable machine to machine interaction over the network. It can be any kind of service provided on the web that can exchange data between applications. In simple terms, it is any program that is callable by another program across the web using standard protocols”. OR, “A Web service is a software system identified by a URI, whose public interfaces and bindings are defined and described using XML. Its definition can be discovered by other software systems. These systems may then interact with the Web service in a manner prescribed…

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