CATIA CAD software from Dassault Systems can export V4 models (*.model) as Universal 3DXML drawings. Probably can be done simply with the Save As.. function or with a dedicated Export one.
Convert CATIA V4 model file to Dassault Systems Universal 3D XML document.
We found 2 software records in the database related to .model to .3dxml file format conversion.
Microsoft Windows software - convert model to 3dxml on Windows
A PLM/CAD/CAM/CAE software suite
Convert from model file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned model to 3dxml. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A 3D product data optimalization software