Relatedness among tunes - is there a way to measure this?
Am looking for a measure that would group tunes into something like families? This could be fraternal twins like Coppers and Brass with Humours of Tullycreen, or non-twin siblings, such as Bucks Of Oranmore with Lucy Campbell, or Statia Donnally with Finbar’s Favorite. Other tunes might score low on ‘relationship’ with other tunes, such as The Blackbird (though there seems to be several versions of this - measure would have to factor in versions of the same tune), or Rights of Man.
It seems like, with the availability of ABC files on so many tunes, some smart individual(s) could find a way(s) to ‘score’ tunes as to their uniqueness.