---
- name: Block Sequence in Block Sequence
  from: NimYAML tests
  tags: sequence
  yaml: |
    - - s1_i1
      - s1_i2
    - s2
  tree: |
    +STR
     +DOC
      +SEQ
       +SEQ
        =VAL :s1_i1
        =VAL :s1_i2
       -SEQ
       =VAL :s2
      -SEQ
     -DOC
    -STR
  json: |
    [
      [
        "s1_i1",
        "s1_i2"
      ],
      "s2"
    ]