A question was asked ealier showing the below chart. At first, I thought this was the Nashville number system, but was informed that the Nashville number system uses 1,2,3, etc., not roman numerals.
Is there a formal name for the system that uses Roman numerals? And how is that system different than the Nashville number system.
Edit: I've found Roman Numeral Analysis, so I assume that must be the formal name. However, I'm still not clear on how the two systems are different (other than syntax).