SOAP

The original abbreviation of SOAP stood for Simple Object Access Protocol. The abbreviation was dropped in version 1.2 of the standard. It's an evolution of the XML-RPC standard.

SOAP consists of three parts:

• The SOAP envelope, defining the message's structure and processing rules
• The SOAP header rules defining application-specific data types (optional)
• The SOAP body, which carries remote procedure calls and responses

Here's an example SOAP message using HTTP as transport:

POST /FindMerchants HTTP/1.1
Host: www.domifair.org
Content-Type: application/soap+xml; charset=utf-8
Content-Length: 345
SOAPAction: "http://www.w3.org/2003/05/soap-envelope"

<?xml version="1.0"?>
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
 <soap:Header>
 </soap:Header>
 <soap:Body xmlns:m="https://www.domifair.org">
    <m:FindMerchants>
      <m:Lat>54.350989</m:Lat>
      <m:Long>18.6548168...