Message

[BR-06]-An Invoice shall contain the Seller name (BT-27).

Context
/ubl:Invoice | /cn:CreditNote
Test
normalize-space(cac:AccountingSupplierParty/cac:Party/cac:PartyLegalEntity/cbc:RegistrationName) != ''
Usage
/ ubl:Invoice / cac:AccountingSupplierParty / cac:Party / cac:PartyLegalEntity / cbc:RegistrationName