%YAML 1.1
---
- name: spec-08-15
  yaml: |
    - # Empty plain scalar
    - ? foo
      :
      ?
      : bar
  tree: |
    +STR
      +DOC
        +SEQ
          =VAL :
          +MAP
            =VAL :foo
            =VAL :
            =VAL :
            =VAL :bar
          -MAP
        -SEQ
      -DOC
    -STR
- name: spec-08-15-canonical
  yaml: |
    %YAML 1.1
    ---
    !!seq [
      !!null "",
      !!map {
        ? !!str "foo"
        : !!null "",
        ? !!null ""
        : !!str "bar",
      }
    ]
  tree: |
    +STR
      +DOC ---
        +SEQ [] <tag:yaml.org,2002:seq>
          =VAL <tag:yaml.org,2002:null> "
          +MAP {} <tag:yaml.org,2002:map>
            =VAL <tag:yaml.org,2002:str> "foo
            =VAL <tag:yaml.org,2002:null> "
            =VAL <tag:yaml.org,2002:null> "
            =VAL <tag:yaml.org,2002:str> "bar
          -MAP
        -SEQ
      -DOC
    -STR