Shame he's not been around because this appears to be one of the best thought out modules for SOAP, XML, WSDL and XSD.

I've gone back to the drawing board and re-written it from scratch. I often find that useful as it helps you question and understand what you previously wrote. Sometimes you can learn a lot from that.

I have and as a result my question is slightly different. So I'll close this and perhaps open a new topic in a couple of days.