urn:ddi:int.example:ea84adda-ee18-4082-a264-0c5a46614ba1:2 int.example ea84adda-ee18-4082-a264-0c5a46614ba1 2 extension:ShouldCalculateFrequenciesForValidValues True extension:ShouldCalculateFrequenciesForInvalidValues True fdz@dezim-institut.de lif0033x01 lif0033x01 lif0033x01 Schwierigkeit Besuch Mutter/Vater für Befragungsperson Difficulty visiting mother/father for respondent Difficulty visiting mother/father for respondent int.example b4b82181-a594-4553-974b-a4f72327e7da 1 QuestionItem int.example 478b1cc5-d39d-4091-8a77-acfa29a123a6 1 CodeList