# PEPPOL-T19-R012

Source: https://xmlvalid.com/rules/PEPPOL-T19-R012

> Each item in a Catalogue line SHALL be identifiable by either "item sellers identifier" or "item standard identifier"

- Level: error
- Rule sets: Peppol Catalogue rules 3.5
- Context: `cac:Item`
- Test: `(cac:StandardItemIdentification/cbc:ID) or (cac:SellersItemIdentification/cbc:ID)`

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