[ibr-068]-GLN MUST have a valid format according to GS1 rules for endpoints (tdt-034), (tdt-049), party identification (tdt-029), (tdt-046), (tdt-060), legal entities (tdt-030), (tdt-047), (tdt-061).
ibr-068
cbc:EndpointID[@schemeID = '0088'] | cac:PartyIdentification/cbc:ID[@schemeID = '0088'] | cbc:CompanyID[@schemeID = '0088']
matches(normalize-space(), '^[0-9]+$') and u:gln(normalize-space())