(
   ( mrel 
      ( mtuple 
         (
            ( SName  string )
            ( Bev  int )
            ( PLZ  int )
            ( Vorwahl  string )
            ( Kennzeichen  string ))))
   (
      ( "Aachen"  239000  5100  "0241"  "AC" )
      ( "Berlin"  1859000  1000  "030"  "B" )
      ( "Bielefeld"  300000  4800  "0521"  "BI" )
      ( "Bochum"  382000  4630  "0234"  "BO" )
      ( "Bonn"  291000  5300  "0228"  "BN" )
      ( "Braunschweig"  248000  3300  "0531"  "BS" )
      ( "Bremen"  526000  2800  "0421"  "HB" )
      ( "Bremerhaven"  134000  2850  "0471"  "HB" )
      ( "Darmstadt"  134000  6100  "06151"  "DA" )
      ( "Dortmund"  572000  4600  "0231"  "DO" )))