urn:ddi:int.example:6489842b-f3ec-4677-9f70-5dadb89e7705:1 int.example 6489842b-f3ec-4677-9f70-5dadb89e7705 1 extension:ShouldCalculateFrequenciesForValidValues False extension:ShouldCalculateFrequenciesForInvalidValues True el-masri@dezim-institut.de Remote + En duration Befragungsdauer Integer