Classification for the primary library ranking
The problem of libraries classification is examined; classification is characterized; the term “type” as the aggregate diverse forms of an object is analyzed. Classification process is to support the selection of every form of the objects being classified and to reveal the essence of the type as a stable system of essential features of the subject being classified. Yu. Stolyarov’s idealized construct of a library is interpreted as a library theoretical type which enables to divide the study subject in the library science from other “libraries”. The library theoretical type corresponds with the singular concept (concept-type) of the library. The characteristic elements of the idealized construct of “Stolyarov’s library” correspond with generic concepts. Various groupings of the four elements of this mental construction determine the existence of several real library forms as the system objects of different structure. Two main library forms (two subtypes) are specified that differ in their structure: i. e. public and private libraries. Library typology is defined as a result of real library form selection in accordance with their theoretical type - the ideal construct made of 4 elements, i. e. Stolyarov’s library.