# Factur-X/ZUGFeRD EN 16931 CII XML

CII namespace parsing, profile context, seller tax registration, and hybrid-invoice preflight assumptions.

## Fixture metadata

- **Format**: ZUGFeRD / Factur-X
- **Profile**: EN 16931
- **Syntax**: UN/CEFACT CII D16B
- **Expected result**: Valid XML payload; PDF/A-3 container not included
- **Covered BT and rule IDs**: BT-1, BT-24, BT-31, BR-CO-10, PDF/A-3 readiness

## What this tests

CII namespace parsing, profile context, seller tax registration, and hybrid-invoice preflight assumptions.

A sanitized CII payload representative of the XML embedded in a hybrid Factur-X/ZUGFeRD PDF.

## Assertions to run

- Parser should recognize the Factur-X EN 16931 guideline ID and CII namespace.
- Seller tax registration should map to BT-31 equivalent in the CII model.
- Hybrid PDF/A-3 validation should remain out of scope because this fixture is XML-only.

## Downloads

- [facturx-cii-en16931.xml](/resources/test-invoices/facturx-cii-en16931.xml): Valid XML payload; PDF/A-3 container not included
- [test-invoices-manifest.json](/resources/test-invoices/test-invoices-manifest.json): Fixture metadata