Emergence as a quality criterion of the phenomenon classification

The methodological paradox, implicit in the phenomenon of classification, serves as a spring of scientific research in the bibliography. The creation of a complete hierarchical classification schemes leads to the manifestation of emergent properties of classes, which in turn, pushes the researchers to attempt to see "the new in the old" through the revision of scientific concepts and ideas. On the other hand, the manifestation of emergent properties in the system of "class-headings" should be considered as a criterion of quality of classification systems. The use of semantic and linguistic approaches, provides new insights on the peculiarities of working professionals systematization.