json_schema: {
      "description": "Minimum required output for a LogMessage",
      "properties": {
          "application": {
              "description": "Application that raised the log.",
              "minLength": 1,
              "type": "string"
          },
          "datetime": {
              "_format": "date-time",
              "description": "The datetime this log event occured (ISO8601 combined date/time format (including timezone) for storage).",
              "type": "string"
          },
          "extra": {
              "description": "Any extra data to store alongside the log entry.",
              "type": [
                  "string",
                  "null"
              ]
          },
          "message": {
              "description": "Message for the log but use printf standard for arguments where required.",
              "minLength": 1,
              "type": "string"
          },
          "messageArgs": {
              "description": "Arguments to format into Message.",
              "minItems": 0,
              "type": "array",
              "_uniqueItems": false
          },
          "module": {
              "description": "Optional module in the application that raised the log.",
              "type": "string"
          },
          "severity": {
              "description": "The severity of this log message.",
              "enum": [
                  "emergency",
                  "alert",
                  "critical",
                  "error",
                  "warning",
                  "notice",
                  "informational",
                  "debug"
              ],
              "type": "string"
          },
          "source": {
              "description": "The identifier of the machine the log came from (IP, DNS name etc, any unique identifier).",
              "minLength": 1,
              "type": "string"
          }
      },
      "required": [
          "severity",
          "datetime",
          "source",
          "application",
          "message"
      ],
      "title": "com.xcitestudios.schema.Logging.LogMessage",
      "type": "object"
  }