UUID

A Universally Unique IDentifier is a 128-bit label used for information in computer systems. The term Globally Unique IDentifier is also used, mostly in Microsoft systems. When generated according to the standard methods, UUIDs are, for practical purposes, unique. History: UUIDs are standardized by the Open Software Foundation (OSF) as part of the Distributed Computing Environment (DCE). UUIDs are documented as part of ISO/IEC 11578:1996 “Information technology – Open Systems Interconnection – Remote Procedure Call (RPC)” and more recently in ITU-T Rec. X.667 | ISO/IEC 9834-8:2014. The Internet Engineering Task Force (IETF) published the Standards-Track RFC 4122,[1] technically equivalent to ITU-T Rec. X.667 | ISO/IEC 9834-8. The “Revise Universally Unique Identifier Definitions Working Group” is working on an update which will introduce additional versions.