A ULID code (Universally Unique Lexicographically Sortable Identifier) is a combination of a 48-bit time stamp (most significant part, with a millisecond accuracy), and a 80-bit random number (least significant part), totalling 128 bits, that is 16 bytes (octets).

The package ULID provides two functions Generate. One function produces a 128-bit number that can be output (for instance) in the UUID format. One function produces a string in the Base32 format (Crockford variant) - the preferred (canonical) representation of a ULID. Additionally, the Generate_Monotonic function enables the production of a monotonically increasing sequence of ULID numbers within the same millisecond.

Alire crate: https://alire.ada.dev/crates/ulid
Mirror: https://github.com/zertovitch/ulid

Features

  • Task safe
  • Sortable
  • Optionally, monotonic
  • Permissive license (MIT)
  • Free, open-source

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License

MIT License

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Additional Project Details

Programming Language

Ada

Registered

2024-01-17