RE: Different Levels of Reliable Messaging

David,

Do you think it would make sense to plot the levels you describe against the other dimension of Web services reliable messaging, i.e. implementation at the transport layer, the SOAP framework layer, or the application layer? In other words, is it easy enough, according to your experience, to recommend an optimal implementation using one of those layers, once you decide which reliable messaging level you want to support? Or is it more difficult than that, and might even involve a combination of layers in some circumstances (e.g. SOAP layer + application layer)?

Thank you,
Ugo