# FX-SCH-A-000570

Source: https://xmlvalid.com/rules/FX-SCH-A-000570

> Value of '@schemeID' is not allowed.

- Level: error
- Rule sets: Factur-X EN 16931 rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerTradeParty/ram:SpecifiedTaxRegistration/ram:ID`
- Test: `string-length($codeValue18)=0 or document('FACTUR-X_EN16931_codedb.xml')/codedb/cl[@id=18]/enumeration[@value=$codeValue18]`

Validate a document against these rules: https://xmlvalid.com/validate