+ # common user-assigned
+ xa => ["user-assigned by Russia: Abkhazia", "c-az Co Xi", "Abkhazia", 'ge'], # also IC alias by CH
+ xo => ["user-assigned by Russia: South Ossetia", "c-az Co Xi", "South Ossetia", 'ge'],
+ xi => ["user-assigned for UK/EU trade: Northern Ireland", "c-eu Co Xi", "Northern Ireland", 'gb'],
+ xn => ["user-assigned by WIPO: Nordic Patent Institute", "c-eu Co Xi", "Nordic", 'dk is no se'],
+ xu => ["user-assigned by WIPO: international org UPOV", "Co Xi", "UPOV"],
+ xv => ["user-assigned by WIPO: Visegrad Patent Institute", "c-eu Co Xi", "Visegrad", 'cz hu pl sk'],
+ xx => ["user-assigned by WIPO: unknown state or other entity", "Co Xi", "other"],
+ xz => ["UN/LOCODE semantics: international waters", "Co Xi", "international"],
+ qm => ["user-assigned by ISRC: United States alternative", "c-na Co Xi", "USA"],