HTTP + XML
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /xml/reply/GetItemCategory HTTP/1.1 
Host: drt-racing.gr 
Content-Type: application/xml
Content-Length: length
<GetItemCategory xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Glx.WebExtApi.ServiceInterface.RetailStudio.RsCalls">
  <RsCode>String</RsCode>
</GetItemCategory>
 
HTTP/1.1 200 OK
Content-Type: application/xml
Content-Length: length
<z:anyType xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/" />