json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "dictionary": {
              "type": "object",
              "patternProperties": {
                  "^[a-zA-Z0-9]{1,10}$": {
                      "type": "string"
                  }
              },
              "additionalProperties": false
          }
      },
      "additionalProperties": false
  }