When Hermann-Mauguin names are used in CLEG notation, they are stand-ins for [space group reference]:[transform], not just [space group reference]. That is, they cannot be followed with a colon and a transform. For example, we can express the relationship between the reference setting P 2/m to its non-reference setting P 2/ m 1 1 as P 2/m > b,c,a > P 2/m 1 1