Reference

BR-DEX-01 Attached document uses a disallowed MIME code

The MIME code of the Attached document (BT-125) must be from the allowed list. In the XRechnung Extension the code application/xml is additionally permitted beyond the codes defined for a binary object.

Problem Description

ERROR

XRechnung extension rule (KoSIT, BR-DEX) · XRechnung 3.0

Context and Significance

This XRechnung Extension rule only fires when the invoice uses the Extension profile, which widens the binary-object MIME list to also allow application/xml.

Solution

Set @mimeCode on the embedded binary object to an allowed value (for example application/pdf, image/png), or application/xml when the Extension carries an XML attachment. If you do not need Extension attachment types, the standard XRechnung CIUS profile avoids this rule.

Quick actions

Validate XML Convert invoice

Valid Examples

EmbeddedDocumentBinaryObject with mimeCode="application/pdf"
Extension attachment with mimeCode="application/xml"

Invalid Examples

EmbeddedDocumentBinaryObject with mimeCode="application/zip"

Code Examples

Valid XML

<cac:AdditionalDocumentReference>
  <cbc:ID>REP-01</cbc:ID>
  <cac:Attachment>
    <cbc:EmbeddedDocumentBinaryObject mimeCode="application/xml"
      filename="detail.xml">UEsDBB...</cbc:EmbeddedDocumentBinaryObject>
  </cac:Attachment>
</cac:AdditionalDocumentReference>

Invalid XML

<cac:AdditionalDocumentReference>
  <cbc:ID>REP-01</cbc:ID>
  <cac:Attachment>
    <cbc:EmbeddedDocumentBinaryObject mimeCode="application/zip"
      filename="detail.zip">UEsDBB...</cbc:EmbeddedDocumentBinaryObject>
  </cac:Attachment>
</cac:AdditionalDocumentReference>

Affected Fields

BT-125 Attached document

Validation Tools

Official KoSIT Validator

Run the official KoSIT validator with the XRechnung configuration to check EN 16931 and XRechnung rules.

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