Message

The ContractFolderID MUST be expressed in a UUID syntax (RFC 4122).

Context
ubl:TendererQualification/cbc:ContractFolderID
Test
matches(normalize-space(.),'^[a-fA-F0-9]{8}(\-[a-fA-F0-9]{4}){3}\-[a-fA-F0-9]{12}$')
Usage
/ t019:QualificationApplicationRequest / cbc:ContractFolderID