1 2#------------------------------------------------------------------------------ 3# autocad: file(1) magic for cad files 4# 5 6# AutoCAD DWG versions R13/R14 (www.autodesk.com) 7# Written December 01, 2003 by Lester Hightower 8# Based on the DWG File Format Specifications at http://www.opendwg.org/ 90 string \101\103\061\060\061 AutoCAD 10>5 string \062\000\000\000\000 DWG ver. R13 11>5 string \064\000\000\000\000 DWG ver. R14 12 13# Microstation DGN/CIT Files (www.bentley.com) 14# Last updated July 29, 2005 by Lester Hightower 15# DGN is the default file extension of Microstation/Intergraph CAD files. 16# CIT is the proprietary raster format (similar to TIFF) used to attach 17# raster underlays to Microstation DGN (vector) drawings. 18# 19# http://www.wotsit.org/search.asp 20# http://filext.com/detaillist.php?extdetail=DGN 21# http://filext.com/detaillist.php?extdetail=CIT 22# 23# http://www.bentley.com/products/default.cfm?objectid=97F351F5-9C35-4E5E-89C2 24# 3F86C928&method=display&p_objectid=97F351F5-9C35-4E5E-89C280A93F86C928 25# http://www.bentley.com/products/default.cfm?objectid=A5C2FD43-3AC9-4C71-B682 26# 721C479F&method=display&p_objectid=A5C2FD43-3AC9-4C71-B682C7BE721C479F 270 string \010\011\376 Microstation 28>3 string \002 29>>30 string \026\105 DGNFile 30>>30 string \034\105 DGNFile 31>>30 string \073\107 DGNFile 32>>30 string \073\110 DGNFile 33>>30 string \106\107 DGNFile 34>>30 string \110\103 DGNFile 35>>30 string \120\104 DGNFile 36>>30 string \172\104 DGNFile 37>>30 string \172\105 DGNFile 38>>30 string \172\106 DGNFile 39>>30 string \234\106 DGNFile 40>>30 string \273\105 DGNFile 41>>30 string \306\106 DGNFile 42>>30 string \310\104 DGNFile 43>>30 string \341\104 DGNFile 44>>30 string \372\103 DGNFile 45>>30 string \372\104 DGNFile 46>>30 string \372\106 DGNFile 47>>30 string \376\103 DGNFile 48>4 string \030\000\000 CITFile 49>4 string \030\000\003 CITFile 50 51# AutoCad, from Nahuel Greco 52# AutoCAD DWG versions R12/R13/R14 (www.autodesk.com) 530 string AC1012 AutoCad (release 12) 540 string AC1013 AutoCad (release 13) 550 string AC1014 AutoCad (release 14) 56 57# CAD: file(1) magic for computer aided design files 58# Phillip Griffith <phillip dot griffith at gmail dot com> 59# AutoCAD magic taken from the Open Design Alliance's OpenDWG specifications. 60# 610 belong 0x08051700 Bentley/Intergraph MicroStation DGN cell library 620 belong 0x0809fe02 Bentley/Intergraph MicroStation DGN vector CAD 630 belong 0xc809fe02 Bentley/Intergraph MicroStation DGN vector CAD 640 beshort 0x0809 Bentley/Intergraph MicroStation 65>0x02 byte 0xfe 66>>0x04 beshort 0x1800 CIT raster CAD 670 string AC1012 AutoDesk AutoCAD R13 680 string AC1014 AutoDesk AutoCAD R14 690 string AC1015 AutoDesk AutoCAD R2000 70