Value MUST be part of code list 'ISO 3166 Alpha-2 Country codes'.
/espd:ESPDResponse/espd-cac:EconomicOperatorParty/espd-cac:RepresentativeNaturalPerson/espd-cbc:NaturalPersonRegistrationCountryCode(some $code in $clespd-CountryCodeIdentifier satisfies $code = normalize-space(text()))