# PEPPOL-T71-B02101

Source: https://xmlvalid.com/rules/PEPPOL-T71-B02101

> Element 'cac:LineReference' MUST be provided.

- Level: error
- Rule sets: Peppol Message Level Response rules 3.0
- Context: `/ubl:ApplicationResponse/cac:DocumentResponse/cac:LineResponse`
- Test: `cac:LineReference`

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