Classification is a hierarchical categorisation of specific phenomena or processes (economic, social or demographic). Classifications are characteristic by the subdivision of phenomena and processes from general to more detailed ones. There is a relation of superiority and subordination among classification levels. In classifications, phenomena and processes are usually subdivided into classes and sub-classes, groups and sub-groups, divisions and sub-divisions. According to its individual levels, classification can be split into several code lists.
All valid statistical classifications are binding both for the institutions performing the state statistical service, and for reporting units who provide data in statistical surveys conducted by the state statistical service.
Classifications form an integral part of the statistical metainformation system. Classifications are regularly updated.
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Statistical metainformation system
