# DXF Export

DXF is an export format, not TraceCad's internal document format.

The MVP exporter uses `netDxf` behind `IDxfExporter` so the implementation can be replaced without changing core or UI code.

## Current Mapping

| TraceCad entity | DXF entity |
| --- | --- |
| `LineEntity` | `LINE` |
| `CircleEntity` | `CIRCLE` |
| `ArcEntity` | `ARC` |

All exported geometry is written in millimetres. Non-exportable layers such as `CONSTRUCTION`, `REFERENCE`, `DIMENSIONS`, and `DEBUG` are skipped by default.