Releases of the TEI Guidelines P1 1990, C.M. Sperberg-McQueen and Lou Burnard P2 1992, C.M. Sperberg-McQueen and Lou Burnard P3 1994, C.M. Sperberg-McQueen and Lou Burnard P4 2001, Lou Burnard, Syd Bauman, and Steven DeRose P5 2007, Lou Burnard and Syd Bauman