SOAP is a relatively simple protocol for computers on a network to exchange information. The main feature of SOAP is that all messages to been exchanged are summarized in XML.
<?xml version='1.0' encoding='UTF-8'?> <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance" xmlns:xsd="http://www.w3.org/1999/XMLSchema"> <SOAP-ENV:Body> <ns1:getRate xmlns:ns1="urn:demo1:exchange" > <country1 xsi:type="xsd:string">USA</country1> <country2 xsi:type="xsd:string">Japan</country2> </ns1:getRate> </SOAP-ENV:Body> </SOAP-ENV:Envelop>