# CII-SR-475

Source: https://xmlvalid.com/rules/CII-SR-475

> Only one AdditionalReferencedDocument Name BT-123 is allowed with TypeCode 916.

- Level: warning
- Rule sets: EN 16931 rules (CII) 1.3.17
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:AdditionalReferencedDocument`
- Test: `normalize-space(ram:TypeCode) != '916' or count(ram:Name) <= 1`

> Only one AdditionalReferencedDocument Name BT-123 is allowed with TypeCode 916.

- Level: warning
- Rule sets: EN 16931 rules 1.3.16 (CII), EXTENDED-CTC-FR rules (CII) 1.4.0.04, Factur-X EN 16931 rules 1.09.2, Factur-X EXTENDED rules 1.09.2
- Context: `/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement`
- Test: `count(ram:AdditionalReferencedDocument[normalize-space(ram:TypeCode) = '916']/ram:Name) <= 1`

## Why it fails

- An invoiced object reference (`ram:AdditionalReferencedDocument` with `ram:TypeCode` `916`) has more than one name, often from attaching several files to one reference.

## How to fix it

- Give every supporting document its own `ram:AdditionalReferencedDocument`, each with one `ram:Name` and one attachment (CII-SR-476).

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