json_schema: {
      "type": "object",
      "$schema": "http://json-schema.org/draft-04/schema",
      "title": "VCMI map object template format",
      "description": "Description of map object tempate that describes appearence of object instance",
      "required": [
          "animation",
          "mask"
      ],
      "additionalProperties": false,
      "properties": {
          "animation": {
              "type": "string",
              "description": "Path to def file with animation of this object",
              "format": "defFile"
          },
          "editorAnimation": {
              "type": "string",
              "description": "Optional path to def file with animation of this object to use in map editor",
              "format": "defFile"
          },
          "visitableFrom": {
              "type": "array",
              "description": "Directions from which this object is visible",
              "minItems": 3,
              "maxItems": 3,
              "items": {
                  "type": "string",
                  "maxLength": 3,
                  "minLength": 3
              }
          },
          "allowedTerrains": {
              "type": "array",
              "items": {
                  "type": "string"
              },
              "description": "List of terrain on which this object can be placed"
          },
          "mask": {
              "type": "array",
              "items": {
                  "type": "string"
              },
              "description": "Object mask that describes on which tiles object is visible/blocked/activatable"
          }
      }
  }