[Clause] Required [Description] A binary value indicating whether a particular practice, qualified data set, or statement is required in an agreement [Applies to] practice clause, qualified data set clause, or statement [Required in Every Proposal] no (defaults to 1 when not present) [Default Type of Label] 0 or 1 [May be Defined in Vocabulary] 
no
y e s
n o
n o , b u t q u a l i f i e r a n d c a t e g o r y c o m p o n e n t s m a y b e