Les Lytollis wrote: > So I define an XML schema of some sort - do a HTTP POST of the XML > request to a URI specified by the SOP system, which responds to the > sending URI with a response XML? Am I on the right lines here? Is it > possible to do something similar without a web server at the SOP end? A rose by any other name... You can call it a "web server" or you can call it a watermelon, but there has to be a process on the SOP end continuously listening to a socket and prepared to deal with whatever requests it receives. So you could write your own, or you could use an existing one :-) For something like this, I'd use Tomcat with a single servlet doing the request translation (SOAP -> SOP query). Tomcat provides basic request handling, security (user or IP address restriction, SSL) if desired, logging, error management, etc. All you have to provide is the SOP interface. And when you're done, the whole works is cross-platform to anything that's got a current JVM... FWIW! -- Hassan Schroeder ----------------------------- hassan at webtuitive.com Webtuitive Design === (+1) 408-938-0567 === http://webtuitive.com dream. code.