{
 "_comment": "A reference example given in the specification, refer to https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/extensions/3DTILES_batch_table_hierarchy#batch-table-json-schema-updates",
 "classes" : [
   {
     "name" : "Wall",
     "length" : 6,
     "instances" : {
       "color" : ["white", "red", "yellow", "gray", "brown", "black"]
     }
   },
   {
     "name" : "Building",
     "length" : 3,
     "instances" : {
       "name" : ["unit29", "unit20", "unit93"],
       "address" : ["100 Main St", "102 Main St", "104 Main St"]
     }
   },
   {
     "name" : "Owner",
     "length" : 3,
     "instances" : {
       "type" : ["city", "resident", "commercial"],
       "id" : [1120, 1250, 6445]
     }
   }
 ],
 "instancesLength" : 12,
 "classIds" : [0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2],
 "parentCounts" : [1, 3, 2, 1, 1, 1, 1, 1, 1, 0, 0, 0],
 "parentIds" : [6, 6, 10, 11, 7, 11, 7, 8, 8, 10, 10, 9]
}
