Type definitions for Universally Unique Identifiers


Version on this page:1.0.5@rev:3
LTS Haskell 20.16:1.0.5@rev:4
Stackage Nightly 2023-03-27:1.0.5@rev:4
Latest on Hackage:1.0.5@rev:4

See all snapshots uuid-types appears in

BSD-3-Clause licensed by Antoine Latter
Maintained by Oleg Grenrus
This version can be pinned in stack with:uuid-types-1.0.5@sha256:9ca76986e3950af5e908502be2373e2292d6dc57ec10f5aeb41d7dc3a1961782,2622

Module documentation for 1.0.5

  • Data
    • Data.UUID

This library contains type definitions for Universally Unique Identifiers (UUID) (as specified in RFC 4122) and basic conversion functions.

See also the 'uuid' package providing a high-level API for managing the different UUID versions.


1.0.5 (2021-05-03)

  • Add (Template Haskell) Lift UUID instance

  • Declare Data.UUID.Types module “Trustworthy” with respect to SafeHaskell.
  • Use more compact heap object representation which saves 16 bytes on 64bit platforms.
  • Add toWords64/fromWords64 functions
  • Drop support for GHC < 7.
  • Add support for random-1.2, i.e. idiomatic Random and added Uniform instances.


  • Bump package dependencies.


  • Add toText/fromText functions.


  • Update dependencies in tests and benchmarks.


  • Initial split from “uuid-1.3.8” package.