Re: [regrep] Direct Data Exchange vs. SOA

["Monica J. Martin" <Monica.Martin@Sun.COM>]

>>>Chiusano: I hope to get some good insight in response please:
>>>
>>>Let's say we have a purchase order process between trading partners (PO
>>>sent, Invoice received). There are (for the purposes of this inquiry) 2
>>>possible ways to handle this process:
>>>
>>>(1) Direct Data Exchange (create XML documents based on a common schema,
>>>and exchange them between trading partners)
>>>
>>>(2) SOA (have a purchase order/invoice shared service that is discovered
>>>in a registry, etc.)
>>>
>>>My inquiry is: What would drive an organization to use one approach or
>>>the other, from both a business and technical standpoint? For instance,
>>>would "critical mass of services and/or trading partners" be a driver
>>>for SOA vs. direct data exchange?
>>>
In the discussion, suggest we also recognize and account for the fact 
that in (1) and (2) that the business process definition may guide the 
exchange regardless of if via a service or via the document exchange. 
Thanks.