DWGSee and Autodesk DWG TrueView are both software programs designed for viewing and working with DWG files, but there are some differences between them:
To install Autodesk DWG TrueView, you need to download the Autodesk installation program first. Then, using the installation program, you can download the main program package. The package size is around 1.46GB, and the download can be slow. The installation process is complex and usually takes around half an hour to complete. In contrast, the DWGSee installation file package is only about 36.38 MB, making it quick to download and install, usually in just a few seconds.
You can open DWG files without AutoCAD using alternative software such as Autodesk DWG TrueView, DWGSee, DraftSight, and others. These programs enable you to view and edit DWG files without AutoCAD. Moreover, certain online converters can change DWG files to formats accessible with common software or even offer online viewing. DWGSee provides both a desktop version and a free online application, making it a popular choice as a DWG viewer.
A DWG file is a 2D or 3D drawing commonly made with Autodesk AutoCAD, a professional CAD software. It contains vector image data and metadata used by AutoCAD and other CAD apps to load drawings. DWG files are linked to .DXF files, ASCII versions of DWG files. Today, you can create DWG files using alternatives like AutoDWG DWGSee CAD, ZwCAD, intelliCAD, and more. Among them, DWGSee is the most lightweight program, consuming fewer computer resources and allowing faster opening and editing of DWG files.
DWGSee and Autodesk DWG TrueView are both software programs designed for viewing and working with DWG files, but there are some differences between them:
To install Autodesk DWG TrueView, you need to download the Autodesk installation program first. Then, using the installation program, you can download the main program package. The package size is around 1.46GB, and the download can be slow. The installation process is complex and usually takes around half an hour to complete. In contrast, the DWGSee installation file package is only about 36.38 MB, making it quick to download and install, usually in just a few seconds.
If you need to open CAD files in multiple formats and can't afford to pay for AutoCAD, then AutoDWG DWGSee will do the trick. AutoDWG DWGSee allows you to view CAD files in multiple formats without having to install the expensive editor.Not only does it allow you to view them, but you can also use the program to navigate CAD files and folders and print them. The Pro version even lets you convert them to image formats and PDF.
In 1998, Autodesk added file verification to AutoCAD R14.01, through a function called DWGCHECK. This function was supported by an encrypted checksum and product code (called a "watermark" by Autodesk), written into DWG files created by the program.[14][15] In 2006 Autodesk modified AutoCAD 2007, to include "TrustedDWG technology", a function which would embed a text string within DWG files written by the program: "Autodesk DWG. This file is a Trusted DWG last saved by an Autodesk application or Autodesk licensed application."[16] This helped Autodesk software users ensure that the files they were opening were created by an Autodesk, or RealDWG application, reducing risk of incompatibilities.[17] AutoCAD would pop up a message, warning of potential stability problems, if a user opened a 2007 version DWG file which did not include this text string.
In 2008 the Free Software Foundation asserted the need for an open replacement for the DWG format, as neither RealDWG[11] nor DWGdirect are licensed on terms that are compatible with free software license like the GNU GPL. Therefore, the FSF placed the goal 'Replacement for OpenDWG libraries' in 10th place on their High Priority Free Software Projects list.[18] Created in late 2009, GNU LibreDWG[19] is a free software library released under the terms of the GNU GPLv3 license. It can read DWG files from version R13 up to 2021, and write R2000 DWG files.
Also in 2008 Autodesk and Bentley Systems agreed on exchange of software libraries, including Autodesk RealDWG, to improve the ability to read and write the companies' respective DWG and DGN formats in mixed environments with greater fidelity. In addition, the two companies will facilitate work process interoperability between their AEC applications through supporting the reciprocal use of available Application Programming Interfaces (APIs).[20]
On November 13, 2006, Autodesk sued the Open Design Alliance alleging that its DWGdirect libraries infringed Autodesk's trademark for the word "Autodesk", by writing the TrustedDWG watermark (including the word "AutoCAD") into DWG files it created.[21] Nine days later, Autodesk's attorneys won a broad and deep temporary restraining order against the Open Design Alliance.[22] In April 2007, the suit was settled, essentially on Autodesk's terms, with Autodesk modifying the warning message in AutoCAD 2008 (to make it somewhat less alarming), and the Open Design Alliance removing support for writing the TrustedDWG watermark from its DWGdirect libraries. The effect of the temporary restraining order and subsequent consent decree was to render the Open Design Alliance's DWGdirect libraries, from one point of view, incapable of creating DWG files that are 100% compatible with AutoCAD Unsubstantiated claim.[citation needed]. Others point out that the failure of "100% compatibility" means only that loading such a drawing triggers an essentially irrelevant warning message when the file is opened in AutoCAD.[23]
In 2006, Autodesk applied for registration of US trademarks on "DWG",[24][25] "DWG EXTREME",[26] "DWG TRUECONVERT",[27] "REALDWG",[28] "DWGX",[29] "DWG TRUEVIEW".[30][31]As early as 1996, Autodesk has disclaimed exclusive use of the DWG mark in US trademark filings.[32] Out of these applications, only TRUSTEDDWG has been registered as a trademark by the USPTO. The REALDWG and DWGX registrations were opposed by SolidWorks. The DWG EXTREME, DWG TRUECONVERT, and DWG TRUEVIEW trademark registration applications all received substantial resistance, with the USPTO examining attorney requiring Autodesk to disclaim exclusive use of DWG as a condition for their registration.
As of June 22, 2008, all of Autodesk's DWG-related trademark registration proceedings were suspended by the USPTO, pending disposition of trademark opposition and cancellation petitions Autodesk had filed against the Open Design Alliance and Dassault Systèmes SolidWorks Corporation. The USPTO office actions notifying Autodesk of this noted that Autodesk was not the exclusive source of files with the format name DWG, and Autodesk does not control the use of DWG by others, either as a trademark or as a file format name, among other points.
In 2006, Autodesk filed an opposition with the USPTO to the trademark registration of DWGGATEWAY by SolidWorks.[34] Autodesk subsequently filed a petition for cancellation of SolidWorks' trademark registration for DWGEDITOR.[35] In both cases, Autodesk's basis was that they had "been using the DWG name with its CAD software products since at least as early as 1983." The opposition and cancellation actions were consolidated, and suspended pending disposition of Autodesk's US District Court suit against SolidWorks.[36]
In 2008, Autodesk sued SolidWorks in US District Court, arguing that through its marketing efforts, the term "DWG" has lost its original generic meaning and taken on a secondary meaning referring specifically to Autodesk's proprietary drawing file format, and therefore any use of "DWG" in competitive products amounted to trademark infringement.[39] In January 2010, on the morning that trial was scheduled to begin, Autodesk and SolidWorks settled the suit, with SolidWorks acknowledging Autodesk's trademark rights for DWG, surrendering its trademark registrations for its DWG related projects, and withdrawing its opposition to Autodesk's DWG-related trademark registrations.[40]
In April 2010, Autodesk and the Open Design Alliance settled their suit, with the Open Design Alliance agreeing to cancel its DWG-based trademark registrations and cease use of DWG and DWG-based trademarks in its product marketing and branding.[41] Because there was no adjudication in either case, the agreements between the parties are not binding upon the USPTO. In March 2010, the Office of the Deputy Commissioner for Trademark Examination Policy at the USPTO determined that evidence submitted by the Open Design Alliance two years earlier was relevant and supported a reasonable ground for refusal to register DWG as a trademark.[42]
DWG is merely descriptive of applicant's goods under Section 2(e)(1) of the Trademark Act for two reasons: (1) DWG is a recognized abbreviation for "drawing," and (2) .dwg is a file format used for computer-aided design (CAD) drawings made both with applicant's CAD software and others' CAD software.
As neither RealDWG[11] nor DWGdirect are licensed on terms that are compatible with free software licenses like the GNU GPL, in 2008 the Free Software Foundation asserted the need for an open replacement for the DWG format. Therefore, the FSF placed the goal 'Replacement for OpenDWG libraries'[18] in 10th place on their High Priority Free Software Projects list.[49] Forked in late 2009 from libDWG, GNU LibreDWG[19] can read all DWG files from version R13 on. But the LibreDWG library, offered under the GNU GPLv3, could initially not be used by most targeted FOSS graphic software, such as FreeCAD, LibreCAD and Blender, because of a GPLv2/GPLv3 license incompatibility.[50][51][52] A GPLv2 licensed alternative is the libdxfrw project, which can read simple DWGs.[53] Some of these CAD licenses were only fixed recently to be able to use LibreDWG's GPLv3.
FreeCAD is a free and open-source application that can work with the DWG files by using the proprietary ODA File Converter for .dwg and .dxf files from the Open Design Alliance (ODA).[54] The ODA also provides a freeware stand-alone viewer for .dwg and .dgn files, ODA Drawings Explorer, which runs on Windows, Linux, and Mac OS X.
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