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   RE: [xml-dev] Web Services/SOA (was RE: [xml-dev] XML 2004 weblog items?

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Perhaps like this:

The receipt of a message is a network level view of the 
architecture.  The receipt of the event type is the
enterprise level view.

The network sees a message.  The enterprise sees the 
content type the message wraps.


From: Chiusano Joseph [mailto:chiusano_joseph@bah.com]

> Are services responses to events?

I believe they are, though some consider this a
separate-but-related-to-SOA concept. I believe Gartner has a concept
called Event Driven Architectures (EDA), which - if I recall correctly
since reading up on it months ago - they consider as another
architectural style (i.e. apart from SOA), but related. 

In essence, the invocation of a service is an event in and of itself -
for example, the receipt of a purchase order by a supplier that is using
Web Services in a SOA can trigger the processing of the purchase order
and (if all goes well) the creation and transmission of an invoice. So
the events here would be the receipt of the purchase order, the
validation of the purchase order, etc.


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