{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Invoice",
  "type": "object",
  "properties": {
    "DocEntry": {
      "type": "integer",
      "description": "Unique document entry number"
    },
    "DocNum": {
      "type": "integer",
      "description": "Document number"
    },
    "CardCode": {
      "type": "string",
      "description": "Customer business partner code"
    },
    "DocDate": {
      "type": "string",
      "description": "Invoice date"
    },
    "DocDueDate": {
      "type": "string",
      "description": "Payment due date"
    },
    "DocTotal": {
      "type": "number",
      "description": "Total invoice amount"
    },
    "DocumentLines": {
      "type": "array",
      "description": "Invoice line items"
    }
  }
}