This is an optional informative reading for people who think they might want to keep working with Roman numerals and also covers how chords are being examined outside of a classical music context:
Here are three corpora and representations for Roman numerals, in rough chronological order from oldest to newest:
- Dmitri Tymoczko, Mark Gotham, Michael Scott Cuthbert, and Christopher Ariza “The RomanText Format: A Flexible and Standard Method for Representing Roman Numeral Analyses,” Proceedings of the International Society for Music Information Retrieval (ISMIR) 20, (2019).
- Files: mostly included in the music21 corpus
- Trevor de Clercq and David Temperley, “A Corpus Analysis of Rock Harmony,” Popular Music 30.1 (2011), pp. 47–70.
- Markus Neuwirth, Daniel Harasim, Fabian C. Moss, Martin Rohrmeier, “The Annotated Beethoven Corpus (ABC): A Dataset of Harmonic Analyses of All Beethoven String Quartets,” Frontiers in Digital Humanities, 3 July 2018.