[Usage] can either be a literal (such as a book title) or a resource class (a set of accepted values, such as a list of terms identifiers from a controlled vocabulary list). [Attribute] 
Codomain
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 )