Message

When Supplier is Greek, there should be no more than one invoice url

Context
/ubl-invoice:Invoice[$isGreekSender] | /ubl-creditnote:CreditNote[$isGreekSender]
Test
(count(cac:AdditionalDocumentReference[cbc:DocumentDescription = '##INVOICE|URL##']) = 0 ) or (count(cac:AdditionalDocumentReference[cbc:DocumentDescription = '##INVOICE|URL##']) = 1 )