Thus, for example, the MagCIF equivalent of SymCIF 142:a-b,a+b+1/4,c-1/8 is 142:a-b,a+b,c;0,1/4,-1/8. This transformation syntax is used extensively at the Bilbao Crystallographic Server (BCS) 6 in relation to both settings and group/subgroup relationships and where it is particularly well described . For example, the title on one of the BCS MAXSUB program output pages for subgroups of P2/c reads: