TNID

This repository contains the TNID specification.

TNIDs are UUIDv8-compatible identifiers with a human-readable name field and compile-time type safety (where possible).

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Overview

Based on UUIDv8, TNIDs maintain full UUID compatibility while adding:

• 20-bit name field for runtime and compile-time type differentiation
• Unambiguous, lexicographically sortable string representation (unlike UUID's case-insensitive hex)
• Two variants: Variant 0 (time-sortable, like UUIDv7) and Variant 1 (high-entropy, like UUIDv4)

TNIDs work anywhere a UUID is expected; all valid TNIDs are valid UUIDs.

Resources

• spec.md - Full specification
• tnid.info - Website with illustrations and examples
• tnid.info/implementations - Known implementations in various languages
• Reference Implementation - A reference implementation in Rust