New material in the second online edition of Volume E

Additional information has been included in the multi-page, multi-column comparison tables of notations (Tables to for the seven crystallographic frieze-group types (two-dimensional groups with one-dimensional translations), the 75 crystallographic rod-group types (three-dimensional groups with one-dimensional translations) and the 80 crystallographic layer-group types (three-dimensional groups with two-dimensional translations) to improve ease of use.

In Chapters 2.1, 3.1 and 4.1, the Seitz notation of each symmetry operation has been included below the corresponding international notation.

All known errors in the first edition have also been corrected.