ISO/IEC 9834-8:2005

Information technology — Open Systems Interconnection — Procedures for the operation of OSI Registration Authorities: Generation and registration of Universally Unique Identifiers (UUIDs) and their use as ASN.1 Object Identifier components — Part 8:

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ISO/IEC 9834-8:2005 specifies the format and generation rules that enable users to produce 128-bit identifiers that are either guaranteed or have a high probability of being globally unique.
The UUIDs generated in conformance with ISO/IEC 9834-8:2005 are suitable either for transient use, with generation of a new UUID every 100 nanoseconds, or as persistent identifiers.
ISO/IEC 9834-8:2005 is derived from earlier non-standard specifications of UUIDs and their generation, and is technically identical to those earlier specifications. It specifies the procedures for the operation of a Web-based Registration Authority for UUIDs.
ISO/IEC 9834-8:2005 also specifies and allows the use of UUIDs (registered or not registered) as OID components under the arc {joint-iso-itu-t uuid(25)}. This enables users to generate OIDs without any registration procedures. It also specifies and allows the use of UUIDs (registered or not registered) to form a URN.