Extension schema for the ZUGFeRD metadata is missing (BR-HYBRID-03)
- Standard: ZUGFeRD
- Severity: error
- Affected fields: BT-24
Meaning
The XMP metadata of a ZUGFeRD PDF must contain a PDF/A extension schema describing the ZUGFeRD properties: prefix, namespace and at least one property. Without it, the PDF does not identify itself as an e-invoice.
Possible causes
- The PDF has no readable XMP metadata, or no extension schema in it (pdfaExtension:schemas).
- The extension schema lacks the prefix, the namespace or the property list.
- Another program rewrote the metadata afterwards and dropped the schema.
How to fix it
- Create the invoice again in your invoicing software and do not edit the PDF with other programs afterwards.
- Take the schema from your ZUGFeRD library's XMP template, with pdfaSchema:prefix, pdfaSchema:namespaceURI and at least one pdfaProperty.