[Xelynega]

That's not how namespacing works though, is it?

Getting UUID 'A' from app 'X' is easily distinguishable from UUID 'A' from app 'Y'.

[charcircuit]

The point of the first U in UUID, universal, is that you don't need to use namespacing.

[tonyhart7]

Universal mean unique that uid wouldn't be used anyone else in any point in history or just universal available in one app????

because you just overreach at this point, if you can develop a better one. be my guest