Message

An item in a catalogue line MUST be uniquely identifiable by at least one of the following: - Catalogue Provider identifier - Standard identifier

Context
//cac:Item
Test
(cac:StandardItemIdentification/cbc:ID) or (cac:SellersItemIdentification/cbc:ID)
Usage
/ ubl:Catalogue / cac:CatalogueLine / cac:Item / cac:SellerItemIdentification / cbc:ID
/ ubl:Catalogue / cac:CatalogueLine / cac:Item / cac:StandardItemIdentification / cbc:ID