description of polymorphic object in the Fields palette

This screenshot of a rule set's layout editor shows a polymorphic object in the Fields palette.

In this image, the polymorphic object (ExpenseDff) is expanded in the palette, showing the object's sub-fields. The list of sub-fields has been filtered for one of the sub-types (Meal), so the palette only shows the fields that would be displayed when the Meal sub-type is applied. The filtered list of fields contains: