# FX-SCH-A-000209

Source: https://xmlvalid.com/rules/FX-SCH-A-000209

> The Item classification identifier (BT-158) shall have a Scheme identifier.

- Level: error
- Rule sets: Factur-X BASIC rules 1.09
- Context: `//ram:IncludedSupplyChainTradeLineItem`
- Test: `(ram:SpecifiedTradeProduct/ram:DesignatedProductClassification/ram:ClassCode/@listID!='') or not (ram:SpecifiedTradeProduct/ram:DesignatedProductClassification)`

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