![](https://lemm.ee/pictrs/image/8e697087-8375-4e61-a933-bddc9c495d44.webp)
![](https://programming.dev/pictrs/image/8140dda6-9512-4297-ac17-d303638c90a6.png)
This draft spec was eventually published as RFC 9562. Compared to the previous spec it adds versions 6, 7, and 8, plus best practices guidance.
Basically, there are a bunch of UUID alternatives that arose to fix the problem that UUIDs are bad for use as database keys in large tables (here’s the perspective of MySQL experts Percona). A bunch of these alternatives are actually linked from the RFC, which I haven’t seen done before. Version 7, in particular, is meant to address this use case.
Cezanne did many “bathers” images that are similar to this. Perhaps you are thinking of that?