Encoding Scheme / Value Vocabulary

A poly-hierarchical classification system for categorizing computing research literature.

A persistent identifier scheme for long-term access to information objects managed by memory institutions.

Twelve broad classes for categorizing the nature or genre of a resource, from Dataset to Text.

The world's most widely used library classification, organizing knowledge by decimal notation since 1876.

A persistent, actionable identifier for digital and physical objects used across scholarly and commercial publishing.

A hierarchical classification of 28,000 subjects for indexing art and iconographic imagery.

The global standard for classifying diseases and causes of death, used by over 130 countries.

The universal numeric identifier for books and monographic publications worldwide since 1970.

A global 16-digit identifier that disambiguates creators and contributors across media industries.

The globally recognized identifier for serial publications including journals, magazines, and newspapers.

The international standard for language identification codes used across libraries and information systems.

Standardized language codes for media and entertainment content distribution workflows.

Organizes knowledge into 21 lettered classes designed for large academic and research libraries.

Organizes biomedical library collections with alphanumeric schedules for preclinical and clinical sciences.

Assigns persistent 16-digit identifiers to researchers, resolving name ambiguity in scholarly communication.

Assigns persistent identifiers to research organizations worldwide, like ORCID for institutions.

A hierarchical eight-digit coding system for classifying products and services in global procurement.

A faceted library classification using combinable notation to index all branches of knowledge.