# F-LIB001

Source: https://xmlvalid.com/rules/F-LIB001

> Invalid UBLVersionID. Must be '2.0' or '2.1'

- Level: error
- Rule sets: OIOUBL 2.1 Invoice rules (Denmark) 1.17.2, OIOUBL 2.1 Credit Note rules (Denmark) 1.17.2, OIOUBL 2.1 Reminder rules (Denmark) 1.17.2
- Test: `cbc:UBLVersionID = '2.0' or cbc:UBLVersionID = '2.1'`

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