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DXF was introduced in December 1982 as part of AutoCAD 1.0, and was intended to provide an exact representation of the data in the AutoCAD native file format, DWG (Drawing). For many years, Autodesk did not publish specifications, making correct creation of DXF files difficult. Autodesk now publishes the incomplete [3] DXF specifications online.
The DXF is primarily 2D-based and its format is a tagged data representation of all the information contained in an AutoCAD drawing file, which means that each data element in the file is preceded by an integer number that is called a group code indicating the type of following data element.
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). [55] 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.
DWG R1.2 file format Version 1.3 1.3 August 1983 3 DWG R1.3 file format Version 1.4 1.4 October 1983 AC1.40 4 DWG R1.4 file format Version 2.0 2.0 October 1984 AC1.50 [3] 5 DWG R2.05 file format Version 2.1 2.1 May 1985 AC2.10 6 DWG R2.1 file format Version 2.5 2.5 June 1986 AC1002 7 DWG R2.5 file format Version 2.6 2.6 April 1987 AC1003 8
Portable Anymap File Format ASCII.pnm image/x-portable-anymap Yes PostScript: page description/scripting language, levels 1–3 Adobe.ps, .ps2, .ps3 printing/publishing industry standard format PPM: Portable Pixmap File Format ASCII.ppm image/x-portable-pixmap Very easy to understand. Programs to analyze and write to this format are easily ...
DWF – Autodesk's Web Design Format; AutoCAD & Revit can publish to this format; similar in concept to PDF files; Autodesk Design Review is the reader; DWG – Popular file format for Computer Aided Drafting applications, notably AutoCAD, Open Design Alliance applications, and Autodesk Inventor Drawing files; EASM – SolidWorks eDrawings ...
An IGES file is composed of 80-character ASCII records, a record length derived from the punched card era. Text strings are represented in "Hollerith" format, the number of characters in the string, followed by the letter "H", followed by the text string, e.g., "4HSLOT" (this is the text string format used in early versions of the Fortran language).
PDF is an internationally recognized open file format developed by Adobe Systems to allow electronic exchange of any printable document, independent of the source application software, hardware and operating system. PDF/E is a subset of v1.6 of the PDF specification specifically designed for engineering use.