DXF entities represent the graphical objects in a drawing, such as lines, circles, arcs, and text. Each entity is defined using group codes that describe its geometry and properties. These entities are stored in the ENTITIES section of the DXF file.

Example: LINE entity

0
LINE
8
Layer1
10
10.0
20
10.0
11
50.0
21
50.0

This example defines a line starting at point (10,10) and ending at point (50,50).