json_schema: {
      "$schema": "http://json-schema.org/draft-06/schema#",
      "type": "object",
      "properties": {
          "name": {
              "type": "string"
          },
          "label": {
              "type": "string"
          },
          "version": {
              "type": "integer",
              "default": 1
          },
          "regions": {
              "type": "array",
              "items": {
                  "$ref": "#/definitions/regionName"
              }
          }
      },
      "required": [
          "name",
          "label",
          "version",
          "regions"
      ],
      "definitions": {
          "regionName": {
              "type": "string",
              "pattern": "^[a-z]+(?:-+[a-z]+)*-v\\d+$"
          }
      }
  }