I think the group decided that "Tale's rules" for checkgroups lines were two arcane to standardize, and the best that could be done was to document them (for historic pouposes) in USEAGE.
All right. Thanks, Charles. (Also thanks for your other answers.) -- Julien ÉLIE « À l'école, en algèbre, j'étais du genre Einstein.Mais plutôt Franck qu'Albert. » (Philippe Geluck)