[Indicates] the referred part of a set, e.g. its beginning or its end.[21] [Category] 
Extension
C o n f i g u r a t i o n
A f f i l i a t i o n
P e r s p e c t i v e
E x t e n s i o n
E s s e n c e
C o n t e x t
D e s i g n a t i o n