Enhancement
If forms are used polymorphically - not only for the type they are defined on, but also for subtypes of this type that do not have their own form definitions, then a special group should be able to be built into the form that displays attributes of these subtypes in a generic way.
Test
- Create type A with subtype B, define a form for type A with the group "Other attributes". Create a table with As and Bs and display the selection in a form. When an A is selected in the table, the attributes described in the form definition should be displayed. When a B is selected, the "Other Attributes" group should appear.