# BR-110-SG

Source: https://xmlvalid.com/rules/BR-110-SG

> Order references in an Invoice shall be provided on either Invoice Line level or on Document level, not both.

- Level: error
- Rule sets: PINT SG rules (Singapore) 1.4.1
- Context: `/ubl:Invoice | /cn:CreditNote`
- Test: `not(exists(cac:OrderReference/cbc:ID[text()!= 'NA']) and exists((cac:InvoiceLine | cac:CreditNoteLine)/cac:OrderLineReference/cac:OrderReference/cbc:ID))`

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