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   Re: [xml-dev] Categories of Web Service messages: data-oriented v s acti

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Hi Mike,

Mike Champion wrote:
 > Message exchange patterns are closely related to the issue of
 > "coupling, and  this is brought out in the rant against the RPC
 > paradigm that someone recently  posted a link to 
I know nothing about CORBA, but I agree with you that the higher success 
of protocols over APIs is a coupling issue, and in fact I'd go further 
and say it's nothing to do with sync/async. For me, the simple problem 
is that an API gives closer coupling between content and transport, 
whereas a protocol give looser coupling. Message structures change 
independently from transport details, so why link them? That's why I 
push document-oriented messaging for business web services.



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