In broad sense prt to dae conversion is used for the purpose of exporting generic CAD/3D parts to Collada 3D exchange format. It's hard to give a specific answer to this, as .prt files are used in numerous software. If you do not know the origin of your part file, the best way would be to try out some dedicated CAD converter as these typically support many different formats.
Updated: July 31, 2023