Skip to contentEN 16931 is the European semantic model for electronic invoices — basis for XRechnung and Peppol.
EN 16931 defines core invoice fields: seller, buyer, line items, tax categories and totals. National CIUS extensions (like XRechnung) add rules validated via Schematron.
Compliance reduces rejected B2B and public-sector invoices. Tentaco bundles validators, glossary and guides for German E-Rechnung workflows.
