Reference
Markdown exportBT-128 Invoice line object identifier
An identifier for an object on which the invoice line is based, such as an order line, despatch advice line, or tender line.
Quick answer
Line items
The goods or services on each invoice line, including quantities, prices, and VAT.
Quick actions
In plain language
Links the invoice line to the corresponding line in the source document (order, tender, etc.).
What you usually enter here
Alphanumeric identifier with meaningful reference
Typical valid values include: PO-001-1, ORDER-123-5, TENDER-ABC-2
Optional but recommended for traceability and audit purposes.
Where the field sits
- Invoice
- cac:InvoiceLine
- cac:DocumentReference
- cbc:IDBT-128
- rsm:CrossIndustryInvoice
- rsm:SupplyChainTradeTransaction
- ram:IncludedSupplyChainTradeLineItem
- ram:SpecifiedLineTradeSettlement
- ram:AdditionalReferencedDocument
- ram:IssuerAssignedIDBT-128
What goes wrong often
Avoid values like: reference
Valid Examples
- PO-001-1
- ORDER-123-5
- TENDER-ABC-2
Invalid Examples
- reference
XML mapping and field facts
Open the technical reference if you need XML paths, validator rule codes, legal wording, or schema-specific mapping details.
Field ID:
BT-128
Data Type:
identifier
Cardinality:
0..1
Requirement:
Optional
Max Length:
50 characters
XML Implementation
/Invoice/cac:InvoiceLine/cac:DocumentReference/cbc:ID/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:IncludedSupplyChainTradeLineItem/ram:SpecifiedLineTradeSettlement/ram:AdditionalReferencedDocument/ram:IssuerAssignedIDNext step
Create an XRechnung from your PDF
The converter reads the invoice and shows the fields it found before download, so you can check and correct the values. No PDF? Fill in the XRechnung directly in the form.
Download requires an account. Subscriptions from €10/month with annual billing (excl. taxes), or €5 per conversion (excl. taxes) without a subscription.