Currency code must be according to ISO 4217:2005
cbc:Amount | cbc:BaseAmount | cbc:PriceAmount | cbc:TaxAmount | cbc:TaxableAmount | cbc:LineExtensionAmount | cbc:TaxExclusiveAmount | cbc:TaxInclusiveAmount | cbc:AllowanceTotalAmount | cbc:ChargeTotalAmount | cbc:PrepaidAmount | cbc:PayableRoundingAmount | cbc:PayableAmount
some $code in $ISO4217 satisfies @currencyID = $code