# PEPPOL-T115-R034

Source: https://xmlvalid.com/rules/PEPPOL-T115-R034

> Specification identifier MUST start with the value 'urn:fdc:peppol.eu:poacc:trns:order_cancellation:3'.

- Level: error
- Rule sets: Peppol Order Cancellation rules 3.0
- Context: `cbc:CustomizationID`
- Test: `starts-with(normalize-space(.), 'urn:fdc:peppol.eu:poacc:trns:order_cancellation:3')`

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