RE: Web Services/SOA (was RE: XML 2004 weblog items?
Are services responses to events? That is likely at least one level higher in the organizational architecture if call and response is the lowest level of description, but if we are to speak of a 'services oriented architecture' that is meaningful beyond the most primitive descriptions, it can be useful to think in terms of event types over messages. Otherwise, a service and a method are indistinguishable. I'm not sure the fact of using XML to send and return the request or the opacity at the boundary are enough to distinguish a service from a method invocation, remote or otherwise. len From: Michael Champion [mailto:michaelc.champion@g...] For what it's worth, all these discussions beg the question of what a "service" is. I've taken a stab at this in http://www.cioupdate.com/trends/article.php/3434691 'In the real world, we use services all the time -- getting money from banks, ordering food from a restaurant, getting clothes dry cleaned, and so on. What makes these "services" is that we don't need to know anything about banking, cooking, cleaning, etc. in order to use them, we simply request them. ...In a nutshell, service orientation is an approach to designing systems in which each component knows only how to request and consume the services provided by other components, and little about their internal algorithms, data structures, stored data formats, query languages, etc.
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