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Architecture of the WIWS system. The original WHAT IF system at the far left is augmented with a software layer that receives streams of automated commands, and sends them to WHAT IF as though they had been typed at the command line. The WIWS server (centre) receives Web service invocations from users in either REST or SOAP format, and matches these with one of the scripted subroutines, which then calls WHAT IF in order to execute the appropriate sequence of instructions.
