Introduzione ai Web Services - Moreno Marzolla

●A WSDL 2.0 interface defines the abstractinterface of a Web service as a set of abstractoperations, each operation representing a simpleinteraction between the client and the service.Each operation specifies the types of messages that theservice can send or receive as part of that operation.Each operation also specifies a message exchange patternthat indicates the sequence in which the associatedmessages are to be transmitted between the parties.For example, the in-out pattern indicates that if the clientsends a message in to the service, the service will eithersend a reply message back out to the client (in the normalcase) or it will send a fault message back to the client (in thecase of an error).Moreno Marzolla Introduzione ai Web Services 31