{
  "regions": {
    "r1": {
      "basic": {
        "name": "Europe",
        "type": "continent",
        "devices": [
          "of:0000000000000001",
          "of:0000000000000002",
          "of:0000000000000003"
        ]
      }
    },
    "r2": {
      "basic": {
        "name": "Paris",
        "type": "metro",
        "devices": [
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          "of:0000000000000005",
          "of:0000000000000006"
        ]
      }
    },
    "r3": {
      "basic": {
        "devices": [
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        ]
      }
    }
  }
}