Message

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

Context
/ubl:CatalogueRequest/cac:ReceiverParty/cbc:EndpointID
Test
not(@schemeID) or (some $code in $clICD satisfies $code = @schemeID)
Code lists
ISO 6523 ICD list
Usage
/ ubl:CatalogueRequest / cac:ReceiverParty / cbc:EndpointID / @schemeID