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🇩🇪 XRechnung 3.0.2 (KoSIT) • SEVERITY: FATAL • BG-24 (Allowed Attachment MIME Types)

How to Fix BR-DEX-01: BG-24 (Allowed Attachment MIME Types)

German KoSIT validation failed on BG-24 (Allowed Attachment MIME Types) at /ubl:Invoice/cac:AdditionalDocumentReference/cac:Attachment/cbc:EmbeddedDocumentBinaryObject/@mimeCode. Standard PDF/ERP exports frequently omit or misformat this mandatory German national rule.

📐 Official Schematron Specification & XPath Diagnosis for BR-DEX-01

BR-DEX-01 — BLOCKING REJECTION
Official Specification Rule
[BR-DEX-01] Binary attachments in XRechnung Extension MUST use an approved MIME type (application/pdf, image/png, image/jpeg, text/csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet).
XPath: /ubl:Invoice/cac:AdditionalDocumentReference/cac:Attachment/cbc:EmbeddedDocumentBinaryObject/@mimeCode
Deterministic Remediation (How to Fix)
Populate or normalize BG-24 (Allowed Attachment MIME Types) in /ubl:Invoice/cac:AdditionalDocumentReference/cac:Attachment/cbc:EmbeddedDocumentBinaryObject/@mimeCode according to XRechnung 3.0.2 specification rules, or click Auto-Fix in the workbench.
❌ REJECTED XML STRUCTURE (TRIGGERS BR-DEX-01)
<!-- Violation of BR-DEX-01 on BG-24 (Allowed Attachment MIME Types) -->
<!-- Missing or malformed node at /ubl:Invoice/cac:AdditionalDocumentReference/cac:Attachment/cbc:EmbeddedDocumentBinaryObject/@mimeCode -->
✅ COMPLIANT XML STRUCTURE (BR-DEX-01 FIXED)
<!-- Compliant BR-DEX-01 structure for BG-24 (Allowed Attachment MIME Types) -->
<!-- Validated against KoSIT XRechnung 3.0.2 Schematron -->

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1. Document Header & Routing Identifiers XRECHNUNG 3.0.2
2. Seller Party & Mandatory Contact (BG-4 / BG-6 / BR-DE-2) BT-27 .. BT-43
3. Buyer Party & Peppol Endpoint (BG-7 / R010) BT-44 .. BT-55
4. Line Items & EN 16931 Mathematical Reconciliation (BR-CO-10 .. 16) BG-25 / BG-22

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