OBJECTS section Contains the data that apply to nongraphical objects, used by AutoLISP, and ObjectARX applications. ENTITIES section This section contains the drawing entities, including any Block References. TABLES section This section contains definitions of named items.īLOCKS section This section contains Block Definition entities describing the entities comprising each Block in the drawing. Generally does not provide sufficient information to allow interoperability with other programs. CLASSES section Holds the information for application-defined classes whose instances appear in the BLOCKS, ENTITIES, and OBJECTS sections of the database. Each parameter has a variable name and an associated value. The basic organization of a DXF file is as follows: HEADER section General information about the drawing. For these reasons many CAD applications use the DWG format which can be licensed from Autodesk or non-natively from the Open Design Alliance.ĭXF coordinates are always without dimensions so that the reader or user needs to know the drawing unit or has to extract it from the textual comments in the sheets.ĪSCII versions of DXF can be read with any text editor. Other object types, including AutoCAD 2006's dynamic blocks, and all of the objects specific to the vertical market versions of AutoCAD, are partially documented, but not well enough to allow other developers to support them. Certain object types, including ACIS solids and regions, are not documented. : 59 Earlier versions support only ASCII.Īs AutoCAD has become more powerful, supporting more complex object types, DXF has become less useful.
Versions of AutoCAD from Release 10 (October 1988) and up support both ASCII and binary forms of DXF. Autodesk now publishes the DXF specifications online.
For many years, Autodesk did not publish specifications, making correct imports of DXF files difficult. January 2007 16 years ago ( 2007-01) ĪutoCAD DXF (Drawing Interchange Format, or Drawing Exchange Format) is a CAD data file format developed by Autodesk for enabling data interoperability between AutoCAD and other programs.ĭXF 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).
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