{
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                        {
                          "type": "null"
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                        {
                          "type": "string"
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                          "const": "auto",
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                          "const": "center",
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                          "const": "perimeter",
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                        {
                          "type": "null"
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                        {
                          "const": "on",
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                          "const": "seating",
                          "type": "string"
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                          "const": "near-window",
                          "type": "string"
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                  {
                    "type": "number"
                  },
                  {
                    "type": "number"
                  }
                ],
                "minItems": 3,
                "maxItems": 3,
                "items": false
              },
              "quaternion": {
                "type": "array",
                "prefixItems": [
                  {
                    "type": "number"
                  },
                  {
                    "type": "number"
                  },
                  {
                    "type": "number"
                  },
                  {
                    "type": "number"
                  }
                ],
                "minItems": 4,
                "maxItems": 4,
                "items": false
              }
            },
            "required": ["position", "quaternion"],
            "additionalProperties": false
          },
          "width": {
            "type": "number"
          },
          "height": {
            "type": "number"
          },
          "traversable": {
            "anyOf": [
              {
                "const": false,
                "type": "boolean"
              },
              {
                "const": true,
                "type": "boolean"
              }
            ]
          },
          "door": {
            "anyOf": [
              {
                "type": "null"
              },
              {
                "type": "string"
              }
            ]
          }
        },
        "required": [
          "identity",
          "alias",
          "room",
          "frame",
          "width",
          "height",
          "traversable",
          "door"
        ],
        "additionalProperties": false
      }
    },
    "membership": {
      "type": "object",
      "properties": {},
      "required": [],
      "additionalProperties": {
        "type": "string"
      }
    }
  },
  "required": [
    "version",
    "identity",
    "rooms",
    "levels",
    "portals",
    "membership"
  ],
  "additionalProperties": false
}