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The top-down approach to data modeling derives the business rules for a data model from an intimate understanding of the nature of the business.
Less Dense Crust
Refers to the Earth's continental crust, which is less dense than oceanic crust, allowing it to float higher on the mantle.
Continental Crust
The dense segment of the Earth's crust responsible for the formation of big terrestrial masses, which is usually more ancient and complex compared to the oceanic crust.
Oceanic Crust
The thin layer of the Earth's crust that underlies the ocean basins, composed mainly of basalt.
Mantle
The layer of the Earth located between the crust and the outer core, composed of silicate rocks rich in iron and magnesium.
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