Message

Attribute 'listID' MUST contain value 'ISO3166-1:Alpha2'

Context
/ubl:CatalogueRequest/cac:ProviderParty/cac:PostalAddress/cac:Country/cbc:IdentificationCode
Test
not(@listID) or @listID = 'ISO3166-1:Alpha2'
Usage
/ ubl:CatalogueRequest / cac:ProviderParty / cac:PostalAddress / cac:Country / cbc:IdentificationCode / @listID