[ibr-068]-GLN MUST have a valid format according to GS1 rules for endpoints (ibt-034), (ibt-049), party identification (ibt-029), (ibt-046), (ibt-060), legal entities (ibt-030), (ibt-047), (ibt-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())