Validation rules

BR-DEX-06

A scheme identifier in the Extension must come from the ISO 6523 ICD list.

Rule: BR-DEX-06 — 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 an ISO 6523 ICD value as the scheme identifier.

BR-DEX-06 auf Deutsch — was bedeutet der Fehler?

Ein Schemabezeichner in der Extension muss aus der ISO-6523-ICD-Liste stammen. Diese Regel gehört zur „Extension XRechnung“; normbill erzeugt die reguläre CIUS.

So beheben Sie den Fehler

Verwenden Sie einen ISO-6523-ICD-Wert.

Official sources

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.

Or try it live: drop any XRechnung XML on the free validator — same KoSIT-backed report, no account.