Drawing Exchange Format

A DXF (Drawing Exchange Format) file consists of several key sections that organize its data to represent 2D and 3D drawings. The HEADER section contains general information and settings for the drawing, such as units and limits. The CLASSES section defines application-specific data classes, aiding in extensibility. The TABLES section holds definitions for line types, layers, text styles, and other drawing components. The BLOCKS section specifies reusable groups of entities, enabling complex structures to be defined once and used multiple times. The ENTITIES section is where the actual drawing elements like lines, circles, arcs, and polylines are listed. Lastly, the OBJECTS section stores non-graphical data such as dictionaries and groups. Each section uses specific group codes and formatting that enable precise interpretation by CAD software.