marc21 939 B

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  1. #--------------------------------------------
  2. # marc21: file(1) magic for MARC 21 Format
  3. #
  4. # Kevin Ford (kefo@loc.gov)
  5. #
  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/
  9. # leader position 20-21 must be 45
  10. 20 string 45
  11. # leader starts with 5 digits, followed by codes specific to MARC format
  12. >0 regex/1l (^[0-9]{5})[acdnp][^bhlnqsu-z] MARC21 Bibliographic
  13. !:mime application/marc
  14. >0 regex/1l (^[0-9]{5})[acdnosx][z] MARC21 Authority
  15. !:mime application/marc
  16. >0 regex/1l (^[0-9]{5})[cdn][uvxy] MARC21 Holdings
  17. !:mime application/marc
  18. 0 regex/1l (^[0-9]{5})[acdn][w] MARC21 Classification
  19. !:mime application/marc
  20. >0 regex/1l (^[0-9]{5})[cdn][q] MARC21 Community
  21. !:mime application/marc
  22. # leader position 22-23, should be "00" but is it?
  23. >0 regex/1l (^.{21})([^0]{2}) (non-conforming)
  24. !:mime application/marc