ISO/IEC 6523 „Information technology — Structure for the identification of organizations and organization parts“ defines a structure for uniquely identifying organizations and parts thereof in computer data interchange and specifies the registration procedure to obtain a so called „International Code Designator (ICD)“ value for an identification scheme.

The standard consists of two parts:

1. ISO/IEC 6523-1:1998 „Identification of organization identification schemes“ defines a structure for the identification of organizations and parts thereof. The components of this structure are the following:

• An International Code Designator (ICD) value, which uniquely identifies the authority which issued the code to the organisation, up to 4 digits.
• organization identifier, up to a maximum of 35 characters
• (optional) organization part identifier (OPI), up to a maximum of 35 characters (An organization part can be any kind of entity within an organization.)
• (optional) an OPI source indicator, 1 digit, specifying who attributed the OPI

2. ISO/IEC 6523-2:1998 „Registration of organization identification schemes“ defines the registration procedure for ICD values. This includes:

• The registration authority for ICD values is the British Standards Institution (BSI).
• the specific procedures for the allocation and deletion of ICD values
• the contents of the register/list of the registered identification schemes

(A list of allocated ICD values is available here. An up to date list may also be acquired by contacting the registration authority BSI.)
Further information concerning ISO/IEC 6523 and on how to obtain an ICD value can be found here.
ISO/IEC 6523 forms the basis of OSI naming under ISO/IEC 8348. It also forms the 1.3 Object Identifier (OID)

Object identifier

In computing, an object identifier or OID is an identifier used to name an object . Structurally, an OID consists of a node in a hierarchically-assigned namespace, formally defined using the ITU-T's ASN.1 standard. Successive numbers of the nodes, starting at the root of the tree, identify each...

 tree.
The „ebCore Party Id Type Technical Specification“ issued by the OASIS ebXML

EbXML

Electronic Business using eXtensible Markup Language, commonly known as e-business XML, or ebXML as it is typically referred to, is a family of XML based standards sponsored by OASIS and UN/CEFACT whose mission is to provide an open, XML-based infrastructure that enables the global use of...

 Core Technical Committee specifies a Uniform Resource Name (URN)

Uniform Resource Name

A uniform resource name is a uniform resource identifier that uses the urn scheme and does not imply availability of the identified resource. Both URNs and URLs are URIs, and a particular URI may be a name and a locator at the same time.The functional requirements for uniform resource names are...

 namespace for organization identifiers. It bases upon ISO/IEC 6523, ISO 9735 and ISO 20022

ISO 20022

ISO 20022 or UNIFI is the ISO Standard for Financial Services Messaging. It describes a Metadata Repository containing descriptions of messages and business processes, and a maintenance process for the Repository Content....

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