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Roger L. Costello wrote, > The purchase-CD action is an attribute of the <PurchaseOrder> > element. The bill-credit-card action is an attribute of the <credit- > card> element. The mail-item action is an attribute of the > <delivery-address> element. > > Questions: > > 1. I am having a really hard time understanding the later two > actions. Of course I understand that a service would need to perform > these two actions, but I fail to understand why a "client" would have > to explicitly specify these actions in the XML message. Such "sub- > actions" seem to be part of the semantics of the umbrella "purchase- > CD" action. Can someone explain this to me? Or, is it just a poor > example of a multi-action message? If so, please give me a better > example. I think it's a mistake to think of these as (sub)actions. If actions correspond intuitively to verbs, then these "subactions" correspond to adverbial modifiers (in what manner? how? with what? where? etc.). Cheers, Miles -- Miles Sabin InterX Internet Systems Architect 27 Great West Road +44 (0)20 8817 4030 Middx, TW8 9AS, UK msabin@i... http://www.interx.com/
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