Talk:Universally unique identifier: Difference between revisions
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== Other |
== Other variants of UUID == |
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Reviewing logs in a web gateway, UUID Variant "e" was observed in the wild. This is not Random as fields 3 4 5 are the same between two seperate UUIDs |
Reviewing logs in a web gateway, UUID Variant "e" was observed in the wild. This is not Random as fields 3 4 5 are the same between two seperate UUIDs |
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Revision as of 00:06, 1 October 2022
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 | The contents of the Globally unique identifier page were merged into Universally unique identifier on 16 January 2017. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
Other variants of UUID
Reviewing logs in a web gateway, UUID Variant "e" was observed in the wild. This is not Random as fields 3 4 5 are the same between two seperate UUIDs
406bb3ab-a127-ec11-981f-c896653b5010 213d5787-2629-ec11-981f-c896653b5010
https://email.ngpvan.com/unsubscribeUnique/406bb3ab-a127-ec11-981f-c896653b5010/213d5787-2629-ec11-981f-c896653b5010?nvep=ewogICJUZW5hbnRVcmkiOiAibmdwdmFuOi8vdmFuL05HUC9OR1A0Mi8xLzg4NTAzIiwKICAiRGlzdHJpYnV0aW9uVW5pcXVlSWQiOiAiMjEzZDU3ODctMjYyOS1lYzExLTk4MWYtYzg5NjY1M2I5MjA4IiwKICAiRW1haWxBZGRyZXNzIjogImxvbGVyY29hc3RlckBjaXNjby5jb20iCn0%3D &hmac=wVRUIC0pn7S85lof8rzhxr1gJh2MXaBVOMZRmH_96HI=&id=1326529531
- Log has been altered to remove PII while not changing data type/or meaning
173.38.117.90 (talk)DBNerd — Preceding undated comment added 13:13, 11 October 2021 (UTC)
New Versions
There is a draft RFC which introduces versions 6, 7 and 8, as well as a form called MAX UUID.
https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format#section-3
I don't know if this proposal merits inclusion, or if we should wait until it is finalized.
Bend1010 (talk) 20:31, 20 July 2022 (UTC)
ULID
Hi folks. As a heads-up, I created a page for universally unique lexicographically sortable identifier (ULID). – ClockworkSoul 17:35, 28 September 2022 (UTC)
What are the different variants of Version 4 UUID's used for?
From what I can determine, Version 4 UUID's -- the random kind -- have four variants, signified by the 17th hex digit being one of "8", "9", " a", or "b" (which is how I will refer to each variant here).
What are these four different variants for? How are they used? What determines the use of (say) variant "a" rather than variant "8"?
I'm writing a program to generate these UUID's pseudorandomly, and I don't want to make some kind of ghastly error by providing the wrong type of UUID! Is there a reason why one would use one v4 variant and not another? Are some v4 variants more apprpriate for some uses, and others for other uses? The main article doesn't even remotely begin to even touch this question...
Guidance? Help? Please? The Grand Rascal (talk) 09:14, 30 September 2022 (UTC)