z/TPFCS often stores the data elements in a collection in USERdata objects.
USERdata objects are embedded in other objects that z/TPFCS uses in its internal
representation of the collection.
A USERdata object only inherits from the OBJECT class. This means that
it only contains a standard object header followed immediately by the actual
user data, which is the data element itself.
Figure 1. USERdata object
