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

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On Mon, Nov 29, 2004 at 11:07:59AM -0500, Chiusano Joseph wrote:
> > And more importantly I'd argue, *how* are those technologies used?
> > "SOA" encompasses many different architectural styles, 
> I believe that SOA is *an* architectural style.

It is, it's just not a particularly useful style because the implicit
constraints (nobody's yet been able to agree on any) of SOA are so few.
Many SOA proponents I've talked to claim this is a good thing, but the
study of software architecture tells us the exact opposite; that only
via constraints are the necessary architectural properties realized
(and many more are required for Internet scale solution than they are
Intranet scale ones).

FWIW, I was using it differently there, to basically say it's used to
simultaneously refer to styles akin to CORBA/OMA, MOM, RPC, etc...

> SOA is not a Web Services technology - Web Services are a tactical means
> to achieve the strategic goal of SOA (credit to Burton Group for that
> characterization).

Sounds like a cop-out to me; a layer of indirection which allows the
analysts to continue to tout "SOA", while "Web services" take the heat
from five years of hype and very little in the way of demonstrated

Mark Baker.   Ottawa, Ontario, CANADA.        http://www.markbaker.ca


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