What is the format of DXF? What software is used to open DXF files

To put it simply: the dxf format file is a graphics file of autocad (can be opened with autocad), but it is more versatile and can be used on many softwares.

Specific introduction: DXF is The CAD data file format developed by Autodesk for the exchange of CAD data between AutoCAD and other software is a vector-based ASCII text format. Since Autocad is the most popular cad system, DXF is also widely used as a de facto standard. Most CAD systems can read or output DXF files. The DXF file is constructed from a number of "code" "value" values" values", the code here is called "group code" (group code), specifying the subsequent value Type and purpose. Each group code and value must be on a separate line. The DXF file is organized into multiple "sections", each segment begins with the group code ""0"; and the string "SECTION" followed by the group code "2" and the character representing the segment name. String (such as HEADER). In the middle of the segment, you can use the group code and value to define the elements in the segment. The end of the paragraph is defined using the group code “0” and the string “ENDSEC”.