SpiceDB is an open source, Google Zanzibar-inspired, database system for creating and managing security-critical application permissions.

SpiceDB

You can model this with a permission:

```
definition resource {
  relation admin: user
  relation owner: user

  permission can_do_everything = owner + admin 
}
```

yes <@790281780434436116> I originally thought of it like that, but then I was trying to think in terms of compositional relations where one relation is composed of others.