# UBL-CR-665

Source: https://xmlvalid.com/rules/UBL-CR-665

> A UBL invoice should not include the AdditionalDocumentReference ID schemeID unless the DocumentTypeCode equals '130'

- Level: warning
- Rule sets: EN 16931 rules (UBL) 1.3.17, EN 16931 rules 1.3.16 (UBL), EXTENDED-CTC-FR rules (UBL) 1.4.0.04, Romanian RO e-Factura rules (UBL) 1.0.9
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `not(//cac:AdditionalDocumentReference[cbc:DocumentTypeCode != '130' or not(cbc:DocumentTypeCode)]/cbc:ID/@schemeID)`

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