The European Directive on electronic invoicing for public authorities (EN 2014/55 / EU) defined a standard invoice (European Norm core invoice aka EN-16930) and made it mandatary to be supported by all public organizations throughout the European Union. At the same time, a number of building blocks have been defined as EIF (European Interoperability Framework), that combined with the EN-16931 provide a definition for VAT compliance.
Source ViaAdvalvas.com
See also 20 Years of e-Invoicing in Europe: Leveraging the EN-16931 for compliance in and outside Europe
