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  1. 

  2. #------------------------------------------------------------------------------
    3. 

  3. # autocad:  file(1) magic for cad files
    4. 

  4. #
    5. 

  5. 

  6. # AutoCAD DWG versions R13/R14 (www.autodesk.com)
    7. 

  7. # Written December 01, 2003 by Lester Hightower
    8. 

  8. # Based on the DWG File Format Specifications at http://www.opendwg.org/
    9. 

  9. 0	string	       \101\103\061\060\061		   AutoCAD
    10. 

  10. >5	string	       \062\000\000\000\000		   DWG ver. R13
    11. 

  11. >5	string	       \064\000\000\000\000		   DWG ver. R14
    12. 

  12. 

  13. # Microstation DGN/CIT Files (www.bentley.com)
    14. 

  14. # Last updated July 29, 2005 by Lester Hightower
    15. 

  15. # DGN is the default file extension of Microstation/Intergraph CAD files.
    16. 

  16. # CIT is the proprietary raster format (similar to TIFF) used to attach
    17. 

  17. # raster underlays to Microstation DGN (vector) drawings.
    18. 

  18. # 
    19. 

  19. # http://www.wotsit.org/search.asp
    20. 

  20. # http://filext.com/detaillist.php?extdetail=DGN
    21. 

  21. # http://filext.com/detaillist.php?extdetail=CIT
    22. 

  22. #
    23. 

  23. # http://www.bentley.com/products/default.cfm?objectid=97F351F5-9C35-4E5E-89C2
    24. 

  24. # 3F86C928&method=display&p_objectid=97F351F5-9C35-4E5E-89C280A93F86C928
    25. 

  25. # http://www.bentley.com/products/default.cfm?objectid=A5C2FD43-3AC9-4C71-B682
    26. 

  26. # 721C479F&method=display&p_objectid=A5C2FD43-3AC9-4C71-B682C7BE721C479F
    27. 

  27. 0	string	\010\011\376			Microstation
    28. 

  28. >3	string	\002
    29. 

  29. >>30	string	\026\105			DGNFile
    30. 

  30. >>30	string	\034\105			DGNFile
    31. 

  31. >>30	string	\073\107			DGNFile
    32. 

  32. >>30	string	\073\110			DGNFile
    33. 

  33. >>30	string	\106\107			DGNFile
    34. 

  34. >>30	string	\110\103			DGNFile
    35. 

  35. >>30	string	\120\104			DGNFile
    36. 

  36. >>30	string	\172\104			DGNFile
    37. 

  37. >>30	string	\172\105			DGNFile
    38. 

  38. >>30	string	\234\106			DGNFile
    39. 

  39. >>30	string	\273\105			DGNFile
    40. 

  40. >>30	string	\306\106			DGNFile
    41. 

  41. >>30	string	\310\104			DGNFile
    42. 

  42. >>30	string	\341\104			DGNFile
    43. 

  43. >>30	string	\372\103			DGNFile
    44. 

  44. >>30	string	\372\104			DGNFile
    45. 

  45. >>30	string	\372\106			DGNFile
    46. 

  46. >>30	string	\376\103			DGNFile
    47. 

  47. >4	string	\030\000\000			CITFile
    48. 

  48. >4	string	\030\000\003			CITFile
    49. 

  49. 

  50. # AutoCad, from Nahuel Greco
    51. 

  51. # AutoCAD DWG versions R12/R13/R14 (www.autodesk.com)
    52. 

  52. 0	string AC1012	AutoCad (release 12)
    53. 

  53. 0	string AC1013	AutoCad (release 13)
    54. 

  54. 0	string AC1014	AutoCad (release 14)
    55.