# FX-SCH-A-000286

Source: https://xmlvalid.com/rules/FX-SCH-A-000286

> Attribute '@filename' is required in this context.

- Level: error
- Rule sets: Factur-X EN 16931 rules 1.09.2, Factur-X EXTENDED rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:AdditionalReferencedDocument[ram:TypeCode="916"]/ram:AttachmentBinaryObject`
- Test: `@filename`

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