Feb 4, 2026 ·
https://createuuid.com/articles/uuid-versions-explained
Feb 4, 2026 · UUID v4 vs v7: which version should you use? Complete guide to UUID v1, v3, v4, v5, v6, and v7 with generator links, examples, and database tips.
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RFC 9562: Universally Unique IDentifiers (UUIDs)
https://www.rfc-editor.org/rfc/rfc9562.html
Feb 22, 2022 · RFC 9562 Universally Unique IDentifiers (UUIDs) Abstract This specification defines UUIDs (Universally Unique IDentifiers) -- also known as GUIDs (Globally Unique IDentifiers) -- and a Uniform Resource Name namespace for UUIDs. A UUID is 128 bits long and is intended to guarantee uniqueness across space and time. UUIDs were originally used in the Apollo Network Computing System (NCS), later in ...
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