Optional and additional subqualifiers are recommended especially for naming soils.
Their use is not recommended for principal qualifiers in map units or wherever
generalization is important.
The use of specifiers does not change the position of the qualifier in the soil name
with the exception of the specifiers Bathy-, Thapto-, and Proto- (see below). The
alphabetical sequence of the supplementary qualifiers is according to the qualifier, not
the subqualifier.
Some subqualifiers can be constructed by the user according to certain rules (see
Chapter 2.4.1). Other subqualifiers have a fixed definition given in Chapter 5 (see
Chapter 2.4.2).