upcoming workshops, teaching material (including videos), invitations for publications, links to other institutions important for the WRB. The WRB 2022 Architecture The classification is based on diagnostic horizons, diagnostic properties and diagnostic materials, altogether called diagnostics. Diagnostic materials are materials that significantly influence soil-forming processes (pedogenesis). They may be inherited from the parent material or be the result of soil-forming processes. Diagnostic properties are typical results of soil-forming processes or reflect specific conditions of soil formation. Diagnostic horizons are typical results of soil-forming processes showing a minimum thickness and therefore a horizontal appearance. The diagnostics have names (e. g. argic horizon, stagnic properties, fluvic material). The classification comprises two levels: The first level has 32 Reference Soil Groups (RSGs). At the second level, for further differentiation a set of qualifiers is added to the name of the RSG. There are 202 qualifiers in total. For every RSG, there is a list of available qualifiers, which are subdivided into two types: Principal qualifiers are ranked and given in an order of importance. The ranking of the principal qualifiers reflects major subdivisions of the respective RSG or properties strongly influencing the soil’s functionality. Supplementary qualifiers describe additional characteristics and are not ranked. Qualifiers may be principal for some RSGs and supplementary for others. The names of the RSGs and the qualifiers start with capital letters. They must be given in English and must not be translated into any other language in order to guarantee that a certain soil has the same name all over the world. Naming a soil A key is used for allocating a soil to a certain RSG. In a defined sequence, the key asks for the presence or absence of certain diagnostics in a certain depth range. In addition, the key asks for single characteristics, e. g., a certain clay content or a certain base saturation. The soil belongs to the first RSG, for which it fulfils the set of criteria. The qualifiers available for use with a particular RSG are listed in the key, along with the RSG. Their number is from 40 to 79. All applying qualifiers must be added to the soil name. The principal qualifiers are added before the name of the RSG. The sequence is from right to left, i. e., the uppermost qualifier in the list is placed closest to the name of the RSG. If no other principal qualifier applies, the