Chapter 5. Modeling Invariants
When it is not necessary to change, It is necessary not to change.
—Lord Falkland
The author believes that the notion of modeling invariants is more fundamental to MBD than translation itself. If you take away from this book a fervor for modeling invariants and never employ translation (or even the OO paradigm itself!) you will still have gained enough to significantly improve the quality of the software that you build. Your applications will be much smaller, they will be easier to understand and maintain, and they will be more reliable. That’s not incremental percentages, that’s integer factors.
Frankly, it is astonishing that the notion of modeling invariants has attracted so little attention in the literature ...
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