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Open Design Specification for .dwg files Version 5.3
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Open Design Specification for .dwg files Version 5.3是由ODS组织编写的dwg技术文档。供大家参考。
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Open Design Specification for .dwg files
Version 5.3
Open Design Alliance
www.opendesign.com
Copyright © 1998-2013 Open Design Alliance, Inc. All rights reserved.
Information in these materials is furnished for informational use only, is subject to change without notice and does not represent
a commitment on the part of Open Design Alliance. Open Design Alliance assumes no responsibility or liability for any errors or
inaccuracies that may appear in these materials. Use these materials at your own risk.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, OPEN DESIGN ALLIANCE AND ITS SUPPLIERS
DISCLAIM ANY AND ALL WARRANTIES AND CONDITIONS, EITHER EXPRESS OR IMPLIED, INCLUDING,
WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, TITLE, AND NON-INFRINGEMENT, AND THOSE ARISING OUT OF USAGE OF TRADE OR COURSE OF
DEALING, CONCERNING THESE MATERIALS. THESE MATERIALS ARE PROVIDED “AS IS” WITHOUT
WARRANTY OF ANY KIND.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL OPEN DESIGN ALLIANCE
OR ITS SUPPLIERS (OR THEIR RESPECTIVE AGENTS, DIRECTORS, EMPLOYEES OR REPRESENTATIVES) BE
LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, CONSEQUENTIAL,
INCIDENTAL, DIRECT, INDIRECT, SPECIAL, ECONOMIC, PUNITIVE OR SIMILAR DAMAGES, OR DAMAGES FOR
LOSS OF BUSINESS PROFITS, LOSS OF GOODWILL, BUSINESS INTERRUPTION, COMPUTER FAILURE OR
MALFUNCTION, LOSS OF BUSINESS INFORMATION OR ANY AND ALL OTHER COMMERCIAL OR PECUNIARY
DAMAGES OR LOSSES) ARISING OUT OF THE USE OF THESE MATERIALS, HOWEVER CAUSED AND ON ANY
LEGAL THEORY OF LIABILITY (WHETHER IN TORT, CONTRACT OR OTHERWISE), EVEN IF OPEN DESIGN
ALLIANCE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER
PARTY. Because some jurisdictions do not allow the exclusion or limitation of liability for consequential or incidental damages,
the above limitation may not apply to you.
Teigha® is a trademark of Open Design Alliance in the United States and/or other countries. All other trademarks, trade names
or company names referenced herein are used for identification only and are the property of their respective owners.
US Government Restricted Rights: These materials are provided with RESTRICTED RIGHTS. Use, duplication or disclosure by
the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of The Rights in Technical Data and Computer
Software clause at DFARS 252.227-7013 or subparagraphs (c)(1) and (2) of the Commercial Computer Software-Restricted
Rights at 48 CFR 52.227-19, as applicable. The contractor/manufacturer is Open Design Alliance, 5025 N Central Ave #602,
Phoenix, AZ, USA.
Printed in USA.
* DWG is the native and proprietary file format for AutoCAD® and a trademark of Autodesk, Inc. The Open Design Alliance is
not associated with Autodesk.
Open Design Specification for .dwg files 3
Open Design Specification for .dwg files
Table of Contents
1 Introduction .............................................................................................................................. 5
2 BIT CODES AND DATA DEFINITIONS .............................................................................. 6
3 R13-R15 DWG FILE FORMAT ORGANIZATION ............................................................ 19
4 R2004 DWG FILE FORMAT ORGANIZATION ................................................................ 22
5 R2007 DWG FILE FORMAT ORGANIZATION ................................................................ 34
6 R2010 DWG FILE FORMAT ORGANIZATION ................................................................ 66
7 R2013 DWG FILE FORMAT ORGANIZATION ................................................................ 67
8 Data section AcDb:Header (HEADER VARIABLES) ......................................................... 68
9 Data section AcDb:Classes .................................................................................................... 82
10 PADDING (R13C3 AND LATER) ................................................................................... 84
11 Data section: “” .................................................................................................................. 85
12 Data section AcDb:SummaryInfo Section ......................................................................... 86
13 Data section AcDb:Preview ............................................................................................... 88
14 Data section AcDb:VBAProject Section ........................................................................... 90
15 Data section AcDb:AppInfo .............................................................................................. 91
16 Data section AcDb:FileDepList ......................................................................................... 93
17 Data section AcDb:RevHistory ......................................................................................... 95
18 Data section AcDb:Security............................................................................................... 96
19 Data section AcDb:AcDbObjects ...................................................................................... 98
20 Data section AcDb:ObjFreeSpace ................................................................................... 234
21 Data section: AcDb:Template .......................................................................................... 235
22 Data section AcDb:Handles (OBJECT MAP) ................................................................. 236
Open Design Specification for .dwg files 4
23 Section AcDb:AcDsPrototype_1b (DataStorage) ............................................................ 237
24 UNKNOWN SECTION ................................................................................................... 248
25 SECOND FILE HEADER (R13-R15) ............................................................................. 249
26 Data section: AcDb:AuxHeader (Auxiliary file header) ................................................. 252
27 Extended Entity Data (Extended Object Data) ......................................................... 254
28 PROXY ENTITY GRAPHICS ........................................................................................ 255
Open Design Specification for .dwg files 5
1 Introduction
Originating in the late 1970s, drawing files created with microcomputer-based computer-aided design
software were saved with the .dwg extension. In the early 1980s, Autodesk® released AutoCAD® which
eventually became the most used CAD software in the world and which used Autodesk’s undocumented
and proprietary DWG™ file format (using the .dwg extension).
The Open Design Specification for .dwg files serves AutoCAD’s undocumented and proprietary DWG
file format. This specification includes DWG file format versions 13 up to and including version 2013.
Further, the Open Design Specification for .dwg files serves the Teigha® software development platform
of the Open Design Alliance.
While our Open Design Specification for .dwg files is able to read and write .dwg files with excellent
AutoCAD compatibility, we continue to work to improve our understanding of all the data in a .dwg file.
If you find information which will help us to understand any unknown values, please contact us at
http://www.opendesign.com/contact.
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- WuGuiampWuJi2014-05-21OpenDesign官方的帮助文档,不错啊
- flowerpower2018-04-04非常有用,非常有用。
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