# PEPPOL-T115-B02601

Source: https://xmlvalid.com/rules/PEPPOL-T115-B02601

> Attribute 'schemeID' MUST be present.

- Level: error
- Rule sets: Peppol Order Cancellation rules 3.0
- Context: `/ubl:OrderCancellation/cac:BuyerCustomerParty/cac:Party/cbc:EndpointID`
- Test: `@schemeID`

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