---
- name: Spec Example 8.19. Compact Block Mappings
  from: http://www.yaml.org/spec/1.2/spec.html#id2799091
  tags: complex-key explicit-key spec mapping
  yaml: |
    - sun: yellow
    - ? earth: blue
      : moon: white
  tree: |
    +STR
     +DOC
      +SEQ
       +MAP
        =VAL :sun
        =VAL :yellow
       -MAP
       +MAP
        +MAP
         =VAL :earth
         =VAL :blue
        -MAP
        +MAP
         =VAL :moon
         =VAL :white
        -MAP
       -MAP
      -SEQ
     -DOC
    -STR