# F-LIB075

Source: https://xmlvalid.com/rules/F-LIB075

> Invalid schemeID. Must be either '…', '…', '…' or '…'.

- 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:ID/@schemeID = $TaxCategory1_schemeID or cbc:ID/@schemeID = $TaxCategory2_schemeID or cbc:ID/@schemeID = $TaxCategory3_schemeID or cbc:ID/@schemeID = $TaxCategory4_schemeID`

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