Round4 external attachment testing

Couple of questions on the round4 external attachment testing:
- the doc says these are unit testcase and not interop ones, but it also 
talks about a requestor and service and sending a message around. If 
they're unit testcases then it would seem we wouldn't need to define these 
roles. Are they really unit testcases?  if so, defining these roles seems 
unnecessary. Any reason its not a true interop test?
- the doc talks about the format of the message between the requestor and 
service but I couldn't find it in the doc - where is it?

thanks
-Doug
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STSM  |  Web Services Architect  |  IBM Software Group
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