Creative mash-ups like HousingMaps use two separate online services, GoogleMaps and www.craigslist.com, to display real estate listings, including photos, over maps of the corresponding neighborhood. Is this an example of SOA?

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Any solution that utilizes services and adheres to the service-orientation paradigm can be considered "service-oriented". The extent to which service-orientation is realized typically determines the measure to which a "true SOA" is eventually created. If the services in your example are a peripheral part of a larger RPC-centric solution consisting of a collection of tightly bound components with little reuse potential, then it would likely not have realized service-orientation to a degree sufficient enough to attain some of the more strategic benefits associated with SOA.

This was first published in April 2006

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