Web Services Standards and Guidelines  A Web services is a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine-processable format (specially WSDL). Other systems interact with the Web services in a manner prescribed by its description using SOAP message. typically conveyed using HTTP with an XML serialization in conjunction with other web-related standards. System Architecture  Runtime Pattern  Design Requirements Design principles Technology components Technology standards Best practice Implementation guide