# FX-SCH-A-000297

Source: https://xmlvalid.com/rules/FX-SCH-A-000297

> Value of '@listID' is not allowed.

- Level: error
- Rule sets: Factur-X EN 16931 rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:IncludedSupplyChainTradeLineItem/ram:SpecifiedTradeProduct/ram:DesignatedProductClassification/ram:ClassCode`
- Test: `string-length($codeValue6)=0 or document('FACTUR-X_EN16931_codedb.xml')/codedb/cl[@id=6]/enumeration[@value=$codeValue6]`

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