The corresponding value is an NSNumber object representing a Compound Predicate Types constant.
If specified, the other keys are ignored and the predicate for the row will be an NSCompoundPredicate predicate whose subpredicates are the predicates of the subrows of the given row.
Available in Mac OS X v10.5 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)