CityJSON semantics proposals

semantics.json

"geometry": [
  {
    "type": "Solid",
    "lod": 1.1,
    "boundaries": [
      [ [[0, 3, 2, 1]], [[4, 5, 6, 7]], [[0, 1, 5, 4]], [[1, 2, 6, 5]], [[2, 3, 7, 6]], [[3, 0, 4, 7]] ] 
    ],
    "semantics": [
      [
        {
          "type": "RoofSurface"
        }, 
        {
          "type": "RoofSurface"
        },
        null,
        null,
        {
          "type": "WallSurface"
        },
        {
          "type": "WallSurface"
        }
      ]
    ]
  }
  
  "geometry": [
  {
    "type": "Solid",
    "lod": 1.1,
    "boundaries": [
      [ [[0, 3, 2, 1]], [[4, 5, 6, 7]], [[0, 1, 5, 4]], [[1, 2, 6, 5]], [[2, 3, 7, 6]], [[3, 0, 4, 7]] ] 
    ],
    "semantics": [
      [
        {
          "type": "RoofSurface",
          "indices": [ [0,0], [0,1] ]  //shell=0;surface=0  +  shell=0;surface=1 
        }, 
        {
          "type": "WallSurface",
          "indices": [ [0,4], [0,5] ]
        }
      ]
    ]
  }