# PEPPOL-T01-R004

Source: https://xmlvalid.com/rules/PEPPOL-T01-R004

> Each order line ordered quantity SHALL not be negative

- Level: error
- Rule sets: Peppol Order rules 3.7
- Context: `cac:OrderLine/cac:LineItem`
- Test: `number(cbc:Quantity) >=0`

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