KERML — Classifier multiplicity, semantics

Multiplicity is a feature of a type (feature or classifier), with natural numbers as its type. For a feature f, the values of its multiplicity (as a feature) are allowed cardinalities for the collection of values on each instance of f 's featuring type, while for classifiers they are allowed cardinalities for the collection of its instances. Math semantics for feature multiplicity is available (rule 5 in 8.4.3.4, Features Semantics), but missing for classifier multiplicity. Is it intended that every instance of a classifier give the number of allowable instances of that classifier? What if there are no instances?