Guides - Technical & Standards
How PDF/A-3 Embeds Machine-Readable XML Inside a Visual Invoice
Technical explanation of ISO 19005-3 associated files (AFRelationship) used in ZUGFeRD and Factur-X.
What this guide covers
Technical explanation of ISO 19005-3 associated files (AFRelationship) used in ZUGFeRD and Factur-X.
Information to confirm before using this format
Check the recipient’s required syntax, the applicable country profile, and the current validation rules. Invoice standards can change, and an accepted file may still be rejected by a specific buyer, public authority, or access point.
Related invoice tools
Use the linked viewer or validator to inspect a local XML file. Treat the result as a technical aid until the required official validation service is connected.
Frequently asked questions
Does How PDF/A-3 Embeds Machine-Readable XML Inside a Visual Invoice send my invoice to a server?
The available MVP interaction runs in your browser. Your selected file is not uploaded by this page.
Does this page certify an invoice as compliant?
No. The MVP can show basic fields and local checks, but it does not replace official XSD, Schematron, KoSIT, Peppol, or tax-authority validation.