PEPPOL-T19-B20202
Document MUST NOT contain elements not part of the data model.
error: the document is invalid
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
/ubl:Catalogue/cac:CatalogueLine/cac:Item/cac:ItemSpecificationDocumentReference/cac:Attachment/cac:ExternalReference/*
Test
false()
Checked with Peppol Catalogue