Difficulty level, roughly compared to ABRSM exam grades. 0 is beginner, 9 is advanced (beyond grade 8).
"Written in a style largely inspired by the extended set pieces of Paddy Maloney of the Chieftains, it begins with an air in free style, followed by another air in 3/4 time. Next, the orignal air returns as a march, which gradually picks up energy until it bubbles over into a wild reel. At the end of the reel, the first air returns one last time as a cantus firmus."