The policy of Hermann-Mauguin names substituting for full CLEG settings avoids the syntax parsing issue that otherwise might appear something like "Pnnn:2:a,b,c;1/4,1/4,1/4" being used for "Pnnn:1". This would be insane. Rather, Unfortunately, Hermann-Mauguin names cannot convey all aspects of a setting to the extent that we are interested in here. While the naming of the 230 reference space group settings Hermann-Mauguin names is unambiguous, as listed in SymCIF:_space_group.name_H-M_ref, there are many cases where these same symbols are used for specific nonreference settings. Thus, use of these symbols in CLEG notion can be problematic and must be considered within their context. For example, the BCS WYCKPOS program for tetragonal SG 86 reports six distinct settings in the context of Wyckoff positions, as shown in Fig. . There are two pairs of duplicates in this listtwo each for C42/e:1 and C42/e:2. This is because, for those transforms, each pair represents a rotation of