Universally Unique Identifier (UUID) Structure
A standard UUID is represented as 32 hexadecimal digits displayed in 5 groups separated by hyphens: `8-4-4-4-12` (totaling 36 characters including hyphens).
UUID Version Info
The first character of the 3rd group (e.g. `4` in `xxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx`) denotes the UUID version standard. Version 4 denotes randomly generated values.
UUID Variant Info
The first character of the 4th group (e.g. `y` in `xxxx-xxxx-xxxx-yxxx-xxxxxxxxxxxx`) indicates the variant schema version. A valid variant 1 UUID uses `8`, `9`, `a`, or `b`.
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