- The ITU (International Telecommunication Union) ITU-T Rec. X.667 document describes the structure of a valid unique 128-bit UUID. You may download a free copy from the ITU website ITU-T Rec. X.667
- To generate a unique 128-bit UUID, you may Get a UUID from the UUID generation tool that is available on the ITU website as well.
Note: The information contained above is used as a reference only, and a user may use different standards and documents that describe the structure and creation of UUIDs.