This is approximately how most Haskell libraries are versioned

  -- PVP summary:     +-+------- breaking API changes
  --                  | | +----- non-breaking API additions
  --                  | | | +--- code changes with no API change
  version:            0.0.0.1

[0]: https://pvp.haskell.org/

[1]: https://pvp.haskell.org/faq/