- The European Directive on electronic invoicing (EN 2014/55 / EU) made support for the standard invoice (EN-16930) mandatory for all public organizations in the European Union.
- The European Interoperability Framework (EIF) and EN-16931 provide a definition for VAT compliance.
- Semantic interoperability ensures precise format and meaning of exchanged data.
- Some countries have defined national CIUS for additional transaction compliance rules.
- The standard also addresses exchange infrastructure, process integration, and mandates B2G e-invoicing in some member states.
- Various countries have different additional syntaxes, compliance platforms, and Peppol as the main exchange standard.
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