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State hierarchy:

States form a state hierarchy: states contained within a state are called sub-states of this surrounding state; the surrounding state is higher in the hierarchy. In the example SUD is the highest state in the state hierarchy and P1, P2 and P3 are its sub-states. SUD is an ancestor of P1, P2 and P3.

Erich Mikk
Tue Nov 24 13:50:54 MET 1998