Message

Value MUST be part of code list 'ISO 6523 ICD list'.

Context
/ubl:Order/cac:BuyerCustomerParty/cac:Party/cac:PartyIdentification/cbc:ID
Test
not(@schemeID) or (some $code in $clICD satisfies $code = @schemeID)
Code lists
ISO 6523 ICD list
Usage
/ ubl:Order / cac:BuyerCustomerParty / cac:Party / cac:PartyIdentification / cbc:ID / @schemeID