urn:ddi:int.example:a86a7c22-2ef3-4f28-8719-fefbb9205c53:2 int.example a86a7c22-2ef3-4f28-8719-fefbb9205c53 2 extension:ShouldCalculateFrequenciesForValidValues True extension:ShouldCalculateFrequenciesForInvalidValues True fdz@dezim-institut.de lif0043x01 lif0043x01 lif0043x01 Schwierigkeit Besuch Vater für Befragungsperson Difficulty visiting father for respondent Difficulty visiting father for respondent int.example c6d2187b-0a85-49bc-b744-b28a4e94d229 1 QuestionItem int.example 5df4fc1e-bd4d-474f-b5a5-34f75b04fe65 1 CodeList