This view shows the recursive nature of
idealisation/realisation levels in the Structural and Transformational models
used.
What this means is that, while there is an overall flow
(Contextual, Conceptual, Logical, Physical and Operational) from the top of the
transformation stack to the bottom, we also recognise that within each level,
information could be Conceptual, Logical or Physical. The Physical sub-level of
each level being the required output, but recognising that in order to produce
it, work at the Logical and Conceptual sub-levels may be required.
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