Code examples for creating, validating, and parsing UN/CEFACT Cross Industry Invoice (CII D16B) XML, the EN 16931 syntax behind ZUGFeRD and Factur-X, via the InvoiceXML REST API. Samples in C#, Java, PHP, Python, Node.js, and browser JavaScript, plus AI-powered PDF to CII conversion.
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Updated
Sep 2, 2026 - HTML