France's e-invoicing reform kicks in September 1st 2026. Germany's has been live since 2025. By 2027, every B2B invoice in the EU will be structured. Yet the amount of bad documentation around Factur-X — the hybrid PDF+XML format mandated in France and widely used in DACH — is impressive. Most "tutorials" either point you at a €5k commercial SDK or wave hands at 200 pages of XML schema. This post