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#(?Set, ?Card)
Card is the cardinality of the integer set Set
- Set
- a set, set variable or set expression
- Card
- a variable, finite domain variable, or integer
Description
    This is a constraint for the cardinality of the set Set.
    Any changes in the potential cardinality of Set will be reflected
    in the finite domain of Card. Restricting the domain of Card will
    restrict the potential cardinality of Set.
Exceptions
- (4) instantiation fault 
- Set is a variable, but not a set variable