IS-R-010
If seller is icelandic and invoice contains supporting description EINDAGI the id date must be same or later than due date — Ef seljandi er íslenskur þá skal eindagi (BT-122, DocumentDescription = EINDAGI) skal vera sami eða síðar en gjalddagi (BT-9) ef eindagi er til staðar.
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.
ubl-creditnote:CreditNote[$SupplierCountry = 'IS'] | ubl-invoice:Invoice[$SupplierCountry = 'IS']
(exists(cac:AdditionalDocumentReference[cbc:DocumentDescription = 'EINDAGI']) and (cbc:DueDate) <= (cac:AdditionalDocumentReference[cbc:DocumentDescription = 'EINDAGI']/cbc:ID)) or not(exists(cac:AdditionalDocumentReference[cbc:DocumentDescription = 'EINDAGI']))
Checked with Peppol BIS Billing 3.0 Invoice, Peppol BIS Billing 3.0 Credit Note