3D CAD models saved in the 3DXML format from Dassault Systems software can be converted to a lot of other model formats, provided you find a software or converter supporting this format. SLDPRT files from SolidWorks are well supported, so it should not be that hard to find a software capable of converting .3dxml files to .sldprt format.
Convert Dassault Systems Universal 3D XML document to SolidWorks CAD part.
We found 2 software records in the database related to .3dxml to .sldprt file format conversion.
Microsoft Windows software - convert 3dxml to sldprt on Windows
A CAD converter with huge format support
Convert from 3dxml 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 3dxml to sldprt. 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 CAD visualizaton, analyzation and translating system