1 #--------------------------------------------
2 # marc21: file(1) magic for MARC 21 Format
4 # Kevin Ford (kefo@loc.gov)
6 # MARC21 formats are for the representation and communication
7 # of bibliographic and related information in machine-readable
8 # form. For more info, see http://www.loc.gov/marc/
11 # leader position 20-21 must be 45
12 # and 22-23 also 00 so far, but we check that later.
16 # leader starts with 5 digits, followed by codes specific to MARC format
17 >>0 regex/1l (^[0-9]{5})[acdnp][^bhlnqsu-z] MARC21 Bibliographic
18 !:mime application/marc
19 >>0 regex/1l (^[0-9]{5})[acdnosx][z] MARC21 Authority
20 !:mime application/marc
21 >>0 regex/1l (^[0-9]{5})[cdn][uvxy] MARC21 Holdings
22 !:mime application/marc
23 >>0 regex/1l (^[0-9]{5})[acdn][w] MARC21 Classification
24 !:mime application/marc
25 >>0 regex/1l (^[0-9]{5})[cdn][q] MARC21 Community
26 !:mime application/marc
28 # leader position 22-23, should be "00" but is it?
29 >>0 regex/1l (^.{21})([^0]{2}) (non-conforming)
30 !:mime application/marc