Content of file used as argument to --filter, containing the filter criteria (all stations in WMO block 11 and two specific stations in WMO block 10):

D: 001001
11
D: 001001 001002
10 28
10 261

Output:

Message 1  ISMD42 EDZW 020600

Subset 1

     1  001001               10  WMO BLOCK NUMBER [NUMERIC]
     2  001002               28  WMO STATION NUMBER [NUMERIC]
     3  001015  Sankt Peter-Ord  STATION OR SITE NAME [CCITTIA5]
     4  010051           101360  PRESSURE REDUCED TO MEAN SEA LEVEL [PA]
     5  012101           291.15  TEMPERATURE/DRY-BULB TEMPERATURE [K]
     6  011001              110  WIND DIRECTION [DEGREE TRUE]
     7  011002              6.2  WIND SPEED [M/S]

Subset 3

     1  001001               10  WMO BLOCK NUMBER [NUMERIC]
     2  001002              261  WMO STATION NUMBER [NUMERIC]
     3  001015        Seehausen  STATION OR SITE NAME [CCITTIA5]
     4  010051           101570  PRESSURE REDUCED TO MEAN SEA LEVEL [PA]
     5  012101           291.55  TEMPERATURE/DRY-BULB TEMPERATURE [K]
     6  011001              120  WIND DIRECTION [DEGREE TRUE]
     7  011002              4.9  WIND SPEED [M/S]

Message 6  ISMD16 OKPR 020600

Subset 1

     1  001001               11  WMO BLOCK NUMBER [NUMERIC]
     2  001002              406  WMO STATION NUMBER [NUMERIC]
     3  001015             Cheb  STATION OR SITE NAME [CCITTIA5]
     4  010051           101500  PRESSURE REDUCED TO MEAN SEA LEVEL [PA]
     5  012101           291.95  TEMPERATURE/DRY-BULB TEMPERATURE [K]
     6  011001                0  WIND DIRECTION [DEGREE TRUE]
     7  011002                1  WIND SPEED [M/S]

Subset 2

     1  001001               11  WMO BLOCK NUMBER [NUMERIC]
     2  001002              414  WMO STATION NUMBER [NUMERIC]
     3  001015     Karlovy Vary  STATION OR SITE NAME [CCITTIA5]
     4  010051          missing  PRESSURE REDUCED TO MEAN SEA LEVEL [PA]
     5  012101           292.35  TEMPERATURE/DRY-BULB TEMPERATURE [K]
     6  011001              270  WIND DIRECTION [DEGREE TRUE]
     7  011002                1  WIND SPEED [M/S]

Subset 3

     1  001001               11  WMO BLOCK NUMBER [NUMERIC]
     2  001002              438  WMO STATION NUMBER [NUMERIC]
     3  001015         Tusimice  STATION OR SITE NAME [CCITTIA5]
...