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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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