Class Group Codes in DXF Files From AutoCAD DXF Format previous page next page Header Group Codes in DXF Files ASCII DXF Files Symbol Table Group Codes in DXF Files DXF Reference > Drawing Interchange File Formats > ASCII DXF Files > Class Group Codes in DXF Files The following is an example of the CLASSES section of a DXF file: 0 SECTION 2 CLASSES Beginning of CLASSES section 0 CLASS 1 <class dxf record> 2 <class name> 3 <app name> 90 <flag> 280 <flag> 281 <flag> Repeats for each entry 0 ENDSEC End of CLASSES section previous page start next page