[1] Appraisal elements occur as children of . Valid tag names are constrained to the set of appraisal names identified in the set attribute of the parent element. For any given appraisal name in the set, zero or one occurrences are allowed within an element. [Annotation] 
Occurrence
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