The W3C defines a "Web service" as "a software system designed to support interoperablemachine-to-machine interaction over a network". It has an interface described in a machine-processable format (specifically Web Services Description Language, known by the acronym WSDL). Other systems interact with the Web service in a manner prescribed by its description using SOAP messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards.
AWeb serviceis a method of communication between two electronic devices over the web.
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in section "Services www (world wide web) in a network the Internet"
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