| Name | Type | Description | Notes |
|---|---|---|---|
| buyerReference | string | BT-10 An internal reference used by the buyer, this can also be used as the 'Leitweg-ID' in Germany BT-10 in XRechnung. | [optional] |
| projectReference | string | BT-11 Reference to a project BT-11 in XRechnung. | [optional] |
| contractReference | string | BT-12 Reference to a contract BT-12 in XRechnung. | [optional] |
| purchaseOrderReference | string | BT-13 Reference to a purchase order created by the buyer BT-13 in XRechnung. | [optional] |
| salesOrderReference | string | BT-14 Reference to a sales order created by the seller BT-14 in XRechnung. | [optional] |
| receivingAdviceReference | string | BT-15 Reference to a delivery note BT-15 in XRechnung. | [optional] |
| dispatchAdviceReference | string | BT-16 Reference to a dispatch advice BT-16 in XRechnung. | [optional] |
| tenderOrLotReference | string | BT-17 Reference to a tender or lot BT-17 in XRechnung. | [optional] |
| invoicedObjectIdentifier | string | BT-18 Reference to a custom item, e.g. a phone number, person, contract or anything that would identify the invoice in the buyer's system BT-18 in XRechnung. | [optional] |
| accountingReference | string | BT-19 This is a reference for accounting, like a cost center or similar. In German, this would be a "Kostenstelle". BT-19 in XRechnung. | [optional] |