urn:ddi:int.example:81b0944f-9955-4a6f-b777-ab98286c8df0:2 int.example 81b0944f-9955-4a6f-b777-ab98286c8df0 2 extension:ShouldCalculateFrequenciesForValidValues True extension:ShouldCalculateFrequenciesForInvalidValues True fdz@dezim-institut.de soc0021_g1 soc0021_g1 soc0021_g1 Geburtsland: Mutter - ISO 3166 Country of birth: mother - ISO 3166 Country of birth: mother - ISO 3166 int.example ab3960b6-de58-48c2-b7a5-ea0c4767c756 1 QuestionItem int.example c8ba0de7-8b45-4aba-9649-2d9ffbc15837 1 CodeList