I don't know how complicated or easy it would be to just create templates which satisfy this.
In Germany it's already required for B2B transactions [0]
In principle, the following formats will comply with CEN 16931:
ZUGFeRD: Hybrid format: Human-readable PDF/A-3 with an embedded XML file in the syntax "Cross-Industry Invoice" (CII)
XRechnung: XML file in the syntax "Cross-Industry Invoice" (CII)
XRechnung: XML file in the "Universal Business Language" (UBL) syntax
