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Full schema hierarchy is defined as two hierarchies: one for textual property values, and one for the things that they describe.

This is the main hierarchy: a collection of types (or "classes"), each of which has one or more parent types. Although a type may have more than one super-type, here we show each type in one branch of the tree only. There is also a parallel hierarchy for data types.


Close hierarchy / Open hierarchy


Close hierarchy / Open hierarchy