Die Funktion "ToIsoDateString" wandelt ein DateTime in einen ISO-Zeitstring im Format "JJJJ-MM-TT hh:mm:ss.ttt"
ToIsoDateString( Datum )
ToIsoDateString( ParseIsoDate( '2010-12-31 23:58:57.123' ) ) == 2010-12-31 23:58:57.123
ToIsoDateString( ParseIsoDate( '2010-12-31 23:58:57.7' ) ) == 2010-12-31 23:58:57.007
ToIsoDateString( ParseIsoDate( '2010-12-31 23:58:57.7Z' ) ) == 2010-12-31 23:58:57.007Z
ToIsoDateString( ParseIsoDate( '2010-12-31 23:58:57.7+1:00' ) ) == 2010-12-31 22:58:57.007Z