class  | 
ListColumnPredicate | 
 Predicate which is the union of a list of predicates, each of which applies
 to the same, single column. 
 | 
class  | 
LiteralStarPredicate | 
 A constraint which always returns true or false. 
 | 
class  | 
MemberColumnPredicate | 
 Column constraint defined by a member. 
 | 
class  | 
MinusStarPredicate | 
 A StarPredicate which evaluates to true if its
 first child evaluates to true and its second child evaluates to false. 
 | 
class  | 
RangeColumnPredicate | 
 Predicate constraining a column to be greater than or less than a given
 bound, or between a pair of bounds. 
 | 
class  | 
ValueColumnPredicate | 
 A constraint which requires a column to have a particular value. 
 |