# FX-SCH-A-000831

Source: https://xmlvalid.com/rules/FX-SCH-A-000831

> Value of '@schemeID' is not allowed.

- Level: error
- Rule sets: Factur-X EXTENDED rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeDelivery/ram:ShipToTradeParty/ram:URIUniversalCommunication/ram:URIID`
- Test: `string-length($codeValue13)=0 or document('FACTUR-X_EXTENDED_codedb.xml')/codedb/cl[@id=13]/enumeration[@value=$codeValue13]`

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