[ibr-tdd-77] – The cac:Item (BG-31) element MUST NOT contain elements other than cbc:Description (BT-154), cbc:Name (BT-153), cac:CommodityClassification, and cac:ClassifiedTaxCategory (BG-30).
ibr-tdd-77/pxs:TaxData/pxs:ReportedTransaction/pxs:ReportedDocument/pxs:DocumentLine/cac:Itemcount(*[not(self::cbc:Description or self::cbc:Name or self::cac:CommodityClassification or self::cac:ClassifiedTaxCategory)]) = 0