Type definitions for Universally Unique Identifiers


Version on this page:1.0.5
LTS Haskell 21.22:
Stackage Nightly 2023-12-01:
Latest on Hackage:

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@sha256:5031383749d57cb95877d7e56f0300be66652b6e57f5ba6681dcc6e4f78d046d,2541

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.