Key: de-xrechnung-v3 Support for the German XRechnung version 3.X standard for electronic invoicing. XRechnung is based on the European Norm (EN) 16931 and is mandatory for business-to-government (B2G) invoices in Germany. This addon provides the necessary structures and validations to ensure compliance with the XRechnung specifications. For more information on XRechnung, visit www.xrechnung.de.