{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/EventNotification",
  "title": "EventNotification",
  "type": "object",
  "description": "It conveys Information related to the event, and possible action (maintenance, message to display). Content of the EventNotification message.",
  "properties": {
    "TimeStamp": {
      "type": "string",
      "format": "date-time",
      "description": "Date and time of a transaction for the Sale System, the POI System or the Acquirer."
    },
    "EventToNotify": {
      "$ref": "#/components/schemas/EventToNotify"
    },
    "EventDetails": {
      "type": "string",
      "pattern": "^.+$",
      "description": "If present, the Sale logs it for further examination."
    },
    "RejectedMessage": {
      "type": "string",
      "format": "byte",
      "pattern": "^.+$",
      "description": "Mandatory if EventToNotify is Reject, absent in other cases."
    },
    "MaintenanceRequiredFlag": {
      "type": "boolean",
      "default": false,
      "description": "Indicates if the occurred event requires maintenance call or action."
    },
    "CustomerLanguage": {
      "type": "string",
      "pattern": "^[a-z]{2,2}$",
      "description": "If the language is selected by the Sale System before the request to the POI."
    },
    "DisplayOutput": {
      "type": "array",
      "items": {
        "$ref": "#/components/schemas/DisplayOutput"
      }
    }
  },
  "required": [
    "TimeStamp",
    "EventToNotify"
  ]
}