# F-LIB087

Source: https://xmlvalid.com/rules/F-LIB087

> Invalid TargetCurrencyBaseRate. Must not be negative or zero

- 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:TargetCurrencyBaseRate and (starts-with(cbc:TargetCurrencyBaseRate, '-') or cbc:TargetCurrencyBaseRate = 0)`

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