FX-SCH-A-000182
Each Preceding Invoice reference (BG-3) shall contain a Preceding Invoice reference (BT-25).
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.
Message
[BR-55] Each Preceding Invoice reference (BG-3) shall contain a Preceding Invoice reference (BT-25).
Context
/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:InvoiceReferencedDocument
Test
(ram:IssuerAssignedID!='')
Checked with Factur-X / ZUGFeRD BASIC