The numbering style of a page-label range (ISO 32000-1 §12.4.2): decimal (1,2,3…), romanLower (i,ii,iii…), romanUpper (I,II,III…), alphaLower (a…z,aa…), alphaUpper (A…Z,AA…), or none (the prefix alone, with no numeric portion).
decimal
romanLower
romanUpper
alphaLower
alphaUpper
none
The numbering style of a page-label range (ISO 32000-1 §12.4.2):
decimal(1,2,3…),romanLower(i,ii,iii…),romanUpper(I,II,III…),alphaLower(a…z,aa…),alphaUpper(A…Z,AA…), ornone(the prefix alone, with no numeric portion).