Overview
ISO 27729:2012 specifies the International Standard name identifier (ISNI), a 16‑digit identifier for the public identities of parties involved in media and content industries. The standard defines the ISNI structure and presentation, the administrative framework for issuing and maintaining identifiers, and the required registration metadata. ISNI provides a practical tool for name disambiguation, linking public identities across publishing, music, audiovisual and cultural heritage systems without embedding meaning in the number itself.
Key technical topics and requirements
- Identifier format: An ISNI is a 16‑character string made up of 15 decimal digits plus a check character (decimal digit or “X”). When displayed for humans it is prefixed by “ISNI” and shown as four groups of four digits (e.g., ISNI 1422 4586 3573 0476).
- Check character algorithm: The check character is calculated using ISO/IEC 7064 MOD 11‑2, documented in Annex A, to detect transcription errors.
- Allocation principles (Annex B):
- One ISNI per public identity; alternative spellings or script variants of the same identity do not require separate ISNIs.
- Distinct public identities (e.g., pseudonyms, corporate successors, groups) get separate ISNIs.
- ISNIs are never re‑used once assigned.
- Administration and governance (Annex C): An ISNI Registration Authority is responsible for ensuring uniqueness, maintaining registers, defining metadata schemas, handling appeals and disputes, and operating continuous services for registrants.
- Registration metadata (Annex D): Records must include the public identity name, type of party (natural person, legal person, group), at least one external data link and information about creation class and role to support disambiguation.
- Interoperability: Annex E describes relationships between ISNI and other identifiers; ISNI is intended to link to other systems rather than to store comprehensive biographical data.
Practical applications and who uses ISO 27729:2012
- Libraries, archives and catalogs: disambiguate authors, creators and corporate entities in bibliographic records.
- Publishers and rights organizations: improve accuracy of rights management, licensing and royalty processing.
- Music and audiovisual industries: link creators, performers, producers across databases and distribution platforms.
- Metadata managers and aggregators: unify records across multiple languages, scripts and metadata schemas.
- Digital platforms and discovery services: enhance search, recommendation and content attribution by resolving ambiguous names.
Related standards
- ISO/IEC 7064 - Check character systems (MOD 11‑2 algorithm used by ISNI).
- ISO 8601, ISO 3166, ISO 6709 - referenced in Annex D for date, country/place and coordinate formatting used in metadata.
ISO 27729:2012 (ISNI) is a practical, interoperable identifier standard focused on reliable name disambiguation and metadata linkage across the cultural and media content ecosystem.