Appendix A -- Drawing Interchange File Formats
ASCII DXF Files
Header Group Codes in DXF Files

Applications can retrieve the values of these variables with the AutoLISP getvar function.

The following is an example of the HEADER section of a DXF file:

  0
SECTION
  2
HEADER


Beginning of HEADER section



  9
$<variable>
<group code>
<value>


Repeats for each header variable



  0
ENDSEC


End of HEADER section