# FX-SCH-A-000638

Source: https://xmlvalid.com/rules/FX-SCH-A-000638

> Value of '@format' is not allowed.

- Level: error
- Rule sets: Factur-X EXTENDED rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:AdditionalReferencedDocument[ram:TypeCode="130"]/ram:FormattedIssueDateTime/qdt:DateTimeString`
- Test: `string-length($codeValue17)=0 or document('FACTUR-X_EXTENDED_codedb.xml')/codedb/cl[@id=17]/enumeration[@value=$codeValue17]`

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