[Usage] indicates if multiple linguistic equivalents are possible or not [Attribute] 
Linguistic indicator
I d e n t i f i e r
P r o p e r t y n a m e
D e f i n i t i o n
L i n g u i s t i c i n d i c a t o r
D o m a i n
C o d o m a i n
C o n t e n t v a l u e r u l e s
R e f i n e s
E x a m p l e ( s )
N o t e ( s )