# W-INV194

Source: https://xmlvalid.com/rules/W-INV194

> The attribute languageID should be used when more than one PriceChangeReason element is present

- Level: warning
- Rule sets: OIOUBL 2.1 Invoice rules (Denmark) 1.17.2
- Context: `doc:Invoice/cac:InvoiceLine/cac:Price/cbc:PriceChangeReason`
- Test: `count(../cbc:PriceChangeReason) > 1 and not(./@languageID)`

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