HTTP + XML
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /xml/oneway/CustomPurchaseInfo HTTP/1.1 
Host: processing-mti.bpmonline.com 
Content-Type: application/xml
Content-Length: length
<ArrayOfKeyValueOfstringstring xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/2003/10/Serialization/Arrays" />