json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema",
      "title": "Tree container",
      "description": "Testing chained containers",
      "$ref": "#/definitions/LevelOneContainer",
      "definitions": {
          "Item": {
              "properties": {
                  "name": {
                      "type": "string"
                  },
                  "value": {
                      "type": "integer"
                  }
              }
          },
          "LevelThreeContainer": {
              "properties": {
                  "items": {
                      "type": "array",
                      "items": {
                          "$ref": "#/definitions/Item"
                      }
                  }
              }
          },
          "LevelTwoContainer": {
              "oneOf": [
                  {
                      "properties": {
                          "threes": {
                              "type": "array",
                              "items": {
                                  "$ref": "#/definitions/LevelThreeContainer"
                              }
                          }
                      }
                  },
                  {
                      "#ref": "#/definitions/LevelThreeContainer"
                  }
              ]
          },
          "LevelOneContainer": {
              "oneOf": [
                  {
                      "properties": {
                          "twos": {
                              "type": "array",
                              "items": {
                                  "$ref": "#/definitions/LevelTwoContainer"
                              }
                          }
                      }
                  },
                  {
                      "#ref": "#/definitions/LevelTwoContainer"
                  }
              ]
          }
      }
  }