root:
  type: dict
  kids:
    entities:
      type: mapofstrings
      required: true
    copyrights:
      type: listofdicts
      required: true
      kids:
        pattern:
          type: listofstrings
          required: true
        style:
          type: string
          values: ["coq", "ocaml", "ec", "elisp"]
          required: true
        copyrights:
          type: listofdicts
          required: true
          kids:
            date:
              type: string
              required: true
            who:
              type: string
              required: true
        license:
          type: string
          require: false