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++1 The additional goodie is when the workflow or phases as Rick calls them are instrumented to enable feedback to the system that adapts the controls. I might have multiplexed pipes. This complicates the example but it's real. One of the high cost items in my market is that Federal standards for data reporting such as NIBRS and UCR are customized by each State and often, each agency. Instead of creating a core standard that remains invariant and then using extensions for variant, they change the core. That kind of change needs transparent justification but that is not how it works. len -----Original Message----- From: Michael Kay [mailto:michael.h.kay@n...] > It would be very useful if we could have a simple example > that shows how > several schemas might be employed, rather than a single schema. Could > someone provide an example? One example I am thinking of is where a document is gradually built up in the course of a workflow. At each stage in the workflow the validation constraints are different. You can think of each schema as a filter that allows the document to proceed to the next stage of processing.
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