Being interested in Webservices, I was searching for something to play with in order to get a bit more practise and found OTRS at work. I was excited and wanted to give it a try, but soon found, that the interface OTRS was offering had little to do with Webservices. It is more like RPC using the SOAP protocol, basic elements like a predefined interface (WSDL) are missing. This makes all the frameworks for Webservices in Java practically useless. After googling around, I found a post from Joko Sastriawan explaining how to build SOAP-Messages using the standard JDK methods.