{
  "variable": {
    "type": "variable",
    "properties": [
      {
        "type": "type",
        "name": "choice"
      },
      {
        "type": "mode",
        "name": "basic"
      },
      {
        "type": "property",
        "name": "mandatory"
      }
    ],
    "choices": [
      "a",
      "b"
    ],
    "paths": [
      "variable"
    ],
    "names": [
      "variable"
    ],
    "descriptions": [
      "A variable."
    ]
  }
}