#-------------------------------------------- # 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 http://www.loc.gov/marc/ # leader position 20-21 must be 45 20 string 45 # leader starts with 5 digits, followed by codes specific to MARC format >0 regex/1 (^[0-9]{5})[acdnp][^bhlnqsu-z] MARC21 Bibliographic !:mime application/marc >0 regex/1 (^[0-9]{5})[acdnosx][z] MARC21 Authority !:mime application/marc >0 regex/1 (^[0-9]{5})[cdn][uvxy] MARC21 Holdings !:mime application/marc 0 regex/1 (^[0-9]{5})[acdn][w] MARC21 Classification !:mime application/marc >0 regex/1 (^[0-9]{5})[cdn][q] MARC21 Community !:mime application/marc # leader position 22-23, should be "00" but is it? >0 regex/1 (^.{21})([^0]{2}) (non-conforming) !:mime application/marc