ISO/IEC 6523-1:2023

Overview

ISO/IEC 6523-1:2023 defines a global structure for unambiguous identification of organizations and their parts for electronic information interchange. Rather than prescribing a single universal identifier, the standard provides a uniform framework to reference existing organization identification schemes, enabling interoperable machine-to-machine exchange across systems, industries and borders. It does not mandate file formats, storage media or languages - only the identification structure and related rules.

Key topics and technical requirements

• International Code Designator (ICD)

  • Uniquely identifies an organization identification scheme.
  • ICD values are integers from 1 to 9999. Values must be unique and not reallocated once assigned. Registration procedures are handled in ISO/IEC 6523-2.

• Organization Identifier (OI)

  • The identifier assigned to an organization within a given scheme.
  • OI must be expressible in ISO/IEC 10646 UTF‑8 encoding, up to 255 octets, and be a single-line field using graphic and space characters as defined by ISO/IEC 10646.

• Organization Part Identifier (OPI) (optional)

  • Used to identify departments, services or other sub-entities within an organization.
  • OPIs can be assigned by the same identification scheme or by alternate methods agreed by interchange partners.

• OPI Source Indicator (OPIS) (optional)

  • Indicates the source of the OPI. In the 2023 edition OPIS content is limited to a single digit (0–9).

• Structure components

  • The identification structure consists of: ICD, OI, optional OPI, and optional OPIS. The document defines their purposes, usage rules and mechanisms to associate them.

Applications and who uses this standard

ISO/IEC 6523-1:2023 is relevant for organizations and technology professionals needing reliable cross‑system identification:

• Systems integrators, enterprise architects and software developers implementing B2B or B2G data exchange.
• Standards bodies and registries that manage or register identification schemes (see ISO/IEC 6523-2).
• Public sector agencies, financial institutions, logistics providers and supply‑chain platforms requiring unambiguous organization IDs for automated processing.
• Message and document standards (EDI, XML/JSON schemas) that reference external organization identifiers.

Benefits include improved accuracy in data interchange, reduced manual reconciliation, faster agreement on interchange rules and lower integration costs.

Related standards

• ISO/IEC 6523-2 - Registration of organization identification schemes (procedure for allocating ICD values).
• ISO/IEC 10646 - Universal coded character set (character repertoire requirements referenced for OI).

Keywords: ISO/IEC 6523-1:2023, organization identification, International Code Designator, ICD, organization identifier, OI, organization part identifier, OPI, OPIS, data interchange, identification schemes.