Reference

BR-CL-24 Attachment MIME code must be one of the allowed MIME types

The MIME code of an embedded attachment (BT-125-1) must be one of the six MIME types that EN 16931 allows: PDF, PNG, JPEG, CSV, Excel spreadsheet (XLSX) or OpenDocument spreadsheet (ODS).

This restriction comes from EN 16931 itself, not from a national extension. The rule checks cbc:EmbeddedDocumentBinaryObject/@mimeCode in UBL and ram:AttachmentBinaryObject/@mimeCode in CII. It fails for common variants such as "image/jpg" (correct: image/jpeg), "application/x-pdf", "application/octet-stream" or a bare "pdf", and for ZIP, XML or Word attachments. The comparison is exact, so upper-case values also fail. Example: a scanned delivery note is embedded as application/pdf.

Solution

Use exactly one of these values: application/pdf, image/png, image/jpeg, text/csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet or application/vnd.oasis.opendocument.spreadsheet. Convert other files, such as Word documents or ZIP archives, to PDF before you embed them.

Quick actions

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Valid Examples

BT-125-1 = application/pdf
BT-125-1 = image/jpeg
BT-125-1 = text/csv

Invalid Examples

BT-125-1 = image/jpg — common variant; the allowed type is image/jpeg
BT-125-1 = application/zip — not an allowed type
BT-125-1 = pdf — not a full MIME type

Code Examples

Valid XML

<cbc:EmbeddedDocumentBinaryObject mimeCode="image/jpeg" filename="delivery-note.jpg">...</cbc:EmbeddedDocumentBinaryObject>

Invalid XML

<cbc:EmbeddedDocumentBinaryObject mimeCode="image/jpg" filename="delivery-note.jpg">...</cbc:EmbeddedDocumentBinaryObject>

Affected Fields

BT-125-1 Attached document Mime code

Validation Tools

Official KoSIT Validator

Run the official KoSIT validator with the XRechnung configuration to check EN 16931 and XRechnung rules.

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