YAML 1.2.2

1. Collections

   Block and flow sequences and mappings.

2. Structures

   Documents, directives, anchors and aliases.

3. Scalars

   Plain, quoted, literal (|) and folded (>) scalars.

4. Tags

   Explicit tags and tag resolution.

5. Processes and information models

   Representation graph, serialization tree and presentation stream.

6. Loading failure points

   Well-formed streams, resolved tags and valid tags.

7. Flow style productions

   Flow sequences, mappings and flow scalars.

8. Block style productions

   Indentation, block scalars and block collections.

9. Recommended schemas

   Failsafe, JSON and Core schemas for implicit typing.

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