[1] Required: set, a name or URI identifying the set of dimension names that can be used. Optional: confidence, the annotator's confidence that the entirety of dimensional annotation given is correct. [Annotation] 
Attributes
D e f i n i t i o n
C h i l d r e n
A t t r i b u t e s
O c c u r r e n c e
A n n o t a t i o n