Identifiers

The Name Authority File (German: Personennamendatei or PND) is an authority file of people, which served primarily to access literature in libraries.

Classification of objects of the administrative-territorial system of Ukraine (KOATUU) (Ukrainian: Класифікатор об'єктів адміністративно-територіального устрою України, КОАТУУ), is a national standardization system established by the State Committee of Ukraine for the Technical Regulations and Consumer Policy on October 31, 1997, #659, and went into effect on January 1, 1998.

GOST (Russian: ГОСТ) refers to a set of technical standards maintained by the Euro-Asian Council for Standardization, Metrology and Certification (EASC), a regional standards organization operating under the auspices of the Commonwealth of Independent States (CIS).

The International Standard Identifier for Libraries and Related Organisations (ISIL), ISO 15511, assigns unique identifiers to libraries and related organisations, such as archives and museums.

Binomial nomenclature (also called binominal nomenclature or binary nomenclature) is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages.

The Dewey Decimal Classification (DDC), or Dewey Decimal System, is a proprietary library classification system first published in the United States by Melvil Dewey in 1876.

Country calling codes or country dial in codes are telephone dialing prefixes for the member countries of the International Telecommunication Union (ITU).

The Universal Decimal Classification (UDC) is a bibliographic and library classification developed by the Belgian bibliographers Paul Otlet and Henri La Fontaine at the end of the 19th century.

The Hubble sequence is a morphological classification scheme for galaxies invented by Edwin Hubble in 1926.

A vehicle registration plate is a metal or plastic plate attached to a motor vehicle or trailer for official identification purposes.

A digital object identifier (DOI) is a type of persistent identifier used to uniquely identify objects.

The Integrated Authority File (German: Gemeinsame Normdatei, also known as: Universal Authority File) or GND is an international authority file for the organisation of personal names, subject headings and corporate bodies from catalogues.

A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints.

A top-level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet.

The International Standard Industrial Classification of All Economic Activities is a United Nations industry classification system.

A uniform title in library cataloging is a title assigned to a work which either has no title or has appeared under more than one title.

i-numbers are a type of Internet identifier designed to solve the problem of how any web resource can have a persistent identity that never changes even when the web resource moves or changes its human-friendly name.

A list of publisher codes for (978) International Standard Book Numbers with a group code of zero.

A list of publisher codes for (978) International Standard Book Numbers with a group code of one.

The Subject Headings Authority File (German: Schlagwortnormdatei) or SWD is a controlled keyword descriptor system used primarily for subject indexing in library catalogs.

The Corporate Bodies Authority File (German: Gemeinsame Körperschaftsdatei) or GKD is a German authority control for the organisation of corporation names (corporate bodies) from catalogues.