In the diagram, represented in Wikipedia
(http://en.wikipedia.org/wiki/Service-oriented_architecture) and referred to
David S. Linthicum, a process/orchestration layer "sits" on the top of the
service layer. Plus, the diagram shows possible inclusion of a service into the
process.
All looks OK until... you have a service whose implementation is a process
managing other service invocations. How to squeeze
it into the diagram? I think, relationship between 'service' and 'process' in
SOA is not linear but it is similar to a famous Korean symbol - everyone
includes every another one.
Comments?
- Michael
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