NFE-338
Rejeição: Número do processo de drawback não informado na exportação [nItem: …] (CFOP …).
In English Exports under drawback (CFOP 7127, 7211) need the drawback number (detExport/nDraw).
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.
nfe:infNFe/nfe:det
not($cfop = ('7127', '7211')) or $prod/nfe:detExport/nfe:nDraw
Checked with NF-e 4.00, NF-e 4.00 with authorisation protocol