Hierarchy
A hierarchy of divisions, with the first entry being a country; each subsequent entry, if any, being a division that is a direct child of the previous entry; and the last entry representing the division that contains the hierarchy.
For example, a hierarchy for the United States is simply [United States]. A hierarchy for the U.S. state of New Hampshire would be [United States, New Hampshire], and a hierarchy for the city of Concord, NH would be [United States, New Hampshire, Merrimack County, Concord].
Underlying type: list<HierarchyItem>
Constraints
minimum length: 1- Ensures all items in a collection are unique. (
UniqueItemsConstraint)