Validation rules
BR-DEX-01
An attached document (BT-125) uses a MIME type outside the list the Extension permits (the CIUS list plus application/xml).
- Rule
BR-DEX-01— official EN 16931 / XRechnung rule- Severity
- error
- Detected by
- tier 3 — KoSIT validator (authoritative)
- Reachability
- Only reachable when validating your own XML — normbill-generated documents cannot trigger it
Belongs to the 'Extension XRechnung' CustomizationID. normbill generates the plain CIUS, never the Extension — reachable only for Extension XML submitted to /v1/invoices/validate.
How to fix it
Use one of the permitted MIME types for the attachment.
BR-DEX-01 auf Deutsch — was bedeutet der Fehler?
Eine Anlage (BT-125) verwendet einen MIME-Typ außerhalb der zulässigen Liste (CIUS-Liste plus application/xml). Diese Regel gehört zur „Extension XRechnung“; normbill erzeugt die reguläre CIUS.
So beheben Sie den Fehler
Verwenden Sie einen zulässigen MIME-Typ.
Official sources
- XRechnung specification (KoSIT / xeinkauf.de)
- KoSIT validator on GitHub and the XRechnung validator configuration
Every 422 from the API lists the rule id, the path in your request JSON, a plain-language message and a suggested fix — see the docs overview for the report format.