It is my belief that in addition to the SOAP standard, we need to document a set of best practices and a create classification of errors that identify potential interoperability issues. I jotted down some of my thoughts on the subject and posted them at:
http://radio.weblogs.com/0101679/stories/2002/02/01/toInfinityAndBeyondTheQuestForSoapInteroperability.html What do people think? - Sam Ruby