codeAThe "A" code that is to be tested. If a code is provided, a system must be providedcode/0..1
codeBThe "B" code that is to be tested. If a code is provided, a system must be providedcode/0..1
systemThe code system in which subsumption testing is to be performed. This must be provided unless the operation is invoked on a code system instanceuri/0..1
+Parameter