History of MEI
§MEI covered in: Electronic Musician (2003), Experiencing Music Technology (2004), XSLT 2.0 (2005)
§Regarding music markup schemes listed at coverpages.org:
§"[M]any of these initiatives will bear little fruit [;however,] [t]here are at least two really serious contenders: the Music Encoding Initiative (MEI) and the Standard Music Description Language (SMDL).  -  Kay, p. 4