DWG

File Format
Name	DWG
Ontology	Electronic File Formats 3D and CAD/CAM Models DWG
Extension(s)	.dwg, .dwt
MIME Type(s)	application/acad, application/x-acad, application/autocad_dwg, image/x-dwg, application/dwg, application/x-dwg, application/x-autocad, image/vnd.dwg, drawing/dwg
PRONOM	fmt/531, others

DWG (AutoCAD Drawing) is the native binary file format for AutoDesk CAD products (AutoCAD, etc.).

Identifiers

Version / Format	Ext.	PRONOM
1.0	.dwg	fmt/21
1.2		fmt/22
1.3		fmt/23
1.4		fmt/24
2.0		fmt/25
2.1		fmt/26
2.2		fmt/27
2.5		fmt/28
2.6		fmt/29
R9		fmt/30
R10		fmt/31
R11/12		fmt/32
R13		fmt/33
R14		fmt/34
2000-2002		fmt/35
2004-2005		fmt/36
2007-2008		x-fmt/455
2010/2011/2012		fmt/434
2013/2014		fmt/531
Drawing Template	.dwt	x-fmt/51

Resources

• Wikipedia page on DWG
• Open Design Alliance's specification on DWG
• LibreDWG, GNU source code to read/write DWG files
• Sample files directly from AutoDesk