I was attempting to explain Programming in the Large to a person that used to program. I roughly explained it as, "the kind of stuff that you would have done with JCL, DOS Batch files or REXX. It is the stuff that links modules together in a loose fashion. It redirects data from one module to another - piping information from the output of X to the input of Y.
Web service orchestration is (IMHO) a much more elegant way to interconnect modules (or services) than many of aforementioned technologies. Yet, in many ways it has similar features to its predecessors. Some new stuff includes: cross-platform interfaces, modules or services have location transparency, strong support for asynchronous messages and the concept of abstract workflows or business processes. You see, it has matured!
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