# F-REM058

Source: https://xmlvalid.com/rules/F-REM058

> Invalid ID. Must contain a value

- Level: error
- Rule sets: OIOUBL 2.1 Reminder rules (Denmark) 1.17.2
- Context: `doc:Reminder/cac:ReminderLine`
- Test: `normalize-space(cbc:ID) != ''`

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