# FX-SCH-A-000427

Source: https://xmlvalid.com/rules/FX-SCH-A-000427

> Value of '@schemeID' is not allowed.

- Level: error
- Rule sets: Factur-X BASIC WL rules 1.09
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerTradeParty/ram:SpecifiedTaxRegistration/ram:ID`
- Test: `string-length($codeValue9)=0 or document('FACTUR-X_BASIC-WL_codedb.xml')/codedb/cl[@id=9]/enumeration[@value=$codeValue9]`

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