Fields of type Related Field of Another Category (read only) allow browsing through Drop-Down Lists until reaching the destination field at any depth.
Example:
In a structure of related categories such as:
Country -> Province -> Population
In which we need to show the data Income Per Capita of the Country in the Population , we can navigate to Province and, from there, to Country . Thus, we can see the available fields in Country and choose the Per Capita Income field directly:
