Multiple certifications/classification/groups

Greeting Oracle Community,

Is there a location in JDE to add/list all of the certifications/classifications that apply to a particular item? We are aware of all of the UDCs that are available to us in the item master and branch, but these only work for finite combinations of classifications. E.g., imagine a universe where items can be class A, class B, class C, etc. One may set up a UDC in the IM/IB with those classes and it works fine if the classes are mutually exclusive (i.e., you only select one class), but what if an item is both class A *and* class