Rules / UBL-DT-23 · Markdown

Peppol BIS Billing 3.0 · rule

UBL-DT-23

Layer en16931·Checked against Peppol BIS Billing 3.0 2026.5

What does UBL-DT-23 mean? Uri attribute should not be present

Why did my invoice fail UBL-DT-23?

The uri attribute should not be present on binary object elements in an EN 16931 UBL invoice. Attachments are either embedded (base64 with mimeCode and filename) or referenced via the separate ExternalReference/URI element (BT-124); a uri attribute on the binary object itself is outside the core model.

Official rule text

Uri attribute should not be present

Common causes

• Mixing embedded and external-reference patterns in one element
• Serializer emits uri metadata on EmbeddedDocumentBinaryObject

How do I fix it?

<cac:Attachment>
  <cac:ExternalReference>
    <cbc:URI>https://example.com/docs/spec.pdf</cbc:URI>
  </cac:ExternalReference>
</cac:Attachment>

Related rules

UBL-DT-01 · UBL-DT-06 · UBL-DT-07 · UBL-DT-08 · UBL-DT-09 · UBL-DT-10 · UBL-DT-11 · UBL-DT-12