Digital Directions: Tiers Without Fears
Why you should pay attention to technology layers.
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Layer modularity. Modularity enables the replacement of one layer without replacing the whole cake. This allows systems to evolve over time.
Well-documented interfaces. The interfaces between layers—how the layers communicate with adjacent layers—should be clearly documented and easily understood by developers. If interfaces are well-documented, then a layer can be replaced, with the new layer connecting to the other layers the same way the old one did.
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Andrew Brenneman
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