| DL_ArcData | Arc Data |
| DL_Attributes | Storing and passing around attributes |
| DL_BlockData | Block Data |
| DL_CircleData | Circle Data |
| DL_Codes | Codes for colors and DXF versions |
| DL_ControlPointData | Spline control point data |
| DL_CreationAdapter | An abstract adapter class for receiving DXF events when a DXF file is being read |
| DL_CreationInterface | Abstract class (interface) for the creation of new entities |
| DL_DimAlignedData | Aligned Dimension Data |
| DL_DimAngular3PData | Angular Dimension Data (3 points version) |
| DL_DimAngularData | Angular Dimension Data |
| DL_DimDiametricData | Diametric Dimension Data |
| DL_DimensionData | Generic Dimension Data |
| DL_DimLinearData | Linear Dimension Data |
| DL_DimRadialData | Radial Dimension Data |
| DL_Dxf | Reading and writing of DXF files |
| DL_EllipseData | Ellipse Data |
| DL_Exception | Used for exception handling |
| DL_Extrusion | Storing and passing around attributes |
| DL_GroupCodeExc | Used for exception handling |
| DL_HatchData | Hatch data |
| DL_HatchEdgeData | Hatch edge data |
| DL_HatchLoopData | Hatch boundary path (loop) data |
| DL_ImageData | Image Data |
| DL_ImageDefData | Image Definition Data |
| DL_InsertData | Insert Data |
| DL_KnotData | Spline knot data |
| DL_LayerData | Layer Data |
| DL_LeaderData | Leader (arrow) |
| DL_LeaderVertexData | Leader Vertex Data |
| DL_LineData | Line Data |
| DL_LineTypeData | Line Type Data |
| DL_MTextData | MText Data |
| DL_NullStrExc | Used for exception handling |
| DL_PointData | Point Data |
| DL_PolylineData | Polyline Data |
| DL_SplineData | Spline Data |
| DL_TextData | Text Data |
| DL_TraceData | Trace Data |
| DL_VertexData | Vertex Data |
| DL_Writer | Defines interface for writing low level DXF constructs to a file |
| DL_WriterA | Implements functions defined in DL_Writer for writing low level DXF constructs to an ASCII format DXF file |
1.4.4