A web service is a method of communication between two electronic devices over the World Wide Web. A web service is a software function provided at a network address over the web or the cloud, it is a service that is "always on" as in the concept of utility computing. The W3C defines a "Web service" as: [... ... ] a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine-processable format.
