Tim Ewald
suggests that Web Services only have 4 simple operations (input, output, input/output, output/input). I think that Tim really gets it but I would have to disagree with this particular comment since I don’t see these as operations; I see them as message exchange patterns.

There is only one logical operation supported by every service and it is called “ProcessMessage” 🙂 Jim and I should really attempt to collect all the ideas, discussions, clarifications on “ProcessMessage” and publish something that can be used as a permanent reference. Another thing to add to the already looooong TODO list!