UUIDs (RFC 9562)

1. UUID format and layout

   128-bit layout, versions and variants.

2. UUID version 1

   Gregorian time-based UUID with node ID.

3. UUID version 4

   Random UUIDs.

4. UUID version 5

   Name-based SHA-1 UUIDs.

5. UUID version 7

   Unix-time ordered UUIDs suited to database keys.

6. Namespace IDs

   Predefined namespaces for name-based UUIDs.

7. Security considerations

   Unguessability and information leaks.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.

• MessagePack Specification
• OpenAPI Specification
• Problem Details for HTTP APIs (RFC 9457)
• REST (Fielding dissertation)
• Semantic Versioning 2.0.0
• Standard Webhooks
• The Unicode Standard
• TOML v1.0.0
• Unicode Annexes and Technical Standards
• UTF-8 (RFC 3629)
• XML 1.0 and Namespaces
• YAML 1.2.2