Although the 3DXML format is not that well supported because it is proprietary and licensed. However some, mainly commercial. CAD converters support it and can convert these CAD files to other formats like the ones from SolidWorks.
Convert Dassault Systems Universal 3D XML document to SolidWorks assembly data.
We found 2 software records in the database related to .3dxml to .sldasm file format conversion.
Microsoft Windows software - convert 3dxml to sldasm 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 sldasm. 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