Validation rules

BR-65

An item classification code (BT-158) has no scheme identifier.

Rule

BR-65 — official EN 16931 / XRechnung rule

Severity

error

Business term

BT-158

Detected by

tier 3 — KoSIT validator (authoritative)

Reachability

Not expressible through the normbill invoice model — documented for completeness

The normbill invoice model has no item classification (BT-158).

How to fix it

Set the listID attribute on cac:CommodityClassification/cbc:ItemClassificationCode.

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.