BR-52

Each Additional supporting document (BG-24) shall contain a Supporting document reference (BT-122).

error: the document is invalid Peppol documentation ↗

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Context
//ram:AdditionalReferencedDocument
Test
normalize-space(ram:IssuerAssignedID) != ''

Checked with EN 16931 Invoice (CII)

Context
cac:AdditionalDocumentReference
Test
(cbc:ID) != ''

Checked with Romania RO e-Factura Invoice (UBL), Romania RO e-Factura Credit Note (UBL)

Context
//ram:AdditionalReferencedDocument
Test
(ram:IssuerAssignedID!='')

Checked with France Factur-X EN 16931, Factur-X / ZUGFeRD EN 16931