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- #--------------------------------------------
- # marc21: file(1) magic for MARC 21 Format
- #
- # Kevin Ford (kefo@loc.gov)
- #
- # MARC21 formats are for the representation and communication
- # of bibliographic and related information in machine-readable
- # form. For more info, see https://www.loc.gov/marc/
- # leader position 20-21 must be 45
- # and 22-23 also 00 so far, but we check that later.
- 20 string 45
- >0 search/2048 \x1e
- # leader starts with 5 digits, followed by codes specific to MARC format
- >>0 regex/1l (^[0-9]{5})[acdnp][^bhlnqsu-z] MARC21 Bibliographic
- !:mime application/marc
- >>0 regex/1l (^[0-9]{5})[acdnosx][z] MARC21 Authority
- !:mime application/marc
- >>0 regex/1l (^[0-9]{5})[cdn][uvxy] MARC21 Holdings
- !:mime application/marc
- >>0 regex/1l (^[0-9]{5})[acdn][w] MARC21 Classification
- !:mime application/marc
- >>0 regex/1l (^[0-9]{5})[cdn][q] MARC21 Community
- !:mime application/marc
- # leader position 22-23, should be "00" but is it?
- >>0 regex/1l (^.{21})([^0]{2}) (non-conforming)
- !:mime application/marc
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