# F-LIB238

Source: https://xmlvalid.com/rules/F-LIB238

> Invalid TaxExchangeRate/ForeignExchangeRate/ID. Must contain a value.

- 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: `cac:ForeignExchangeContract and not(normalize-space(cac:ForeignExchangeContract/cbc:ID) != '')`

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