SWI-Prolog -- shell_register_file

Documentation
- Reference manual
  - The SWI-Prolog library
    - library(registry): Manipulating the Windows registry
- Packages

shell_register_file_type(+Ext, +Type, +Name, +OpenAction)

Register a file-type. Ext is the extension to associate. Type is the type name, often something like prolog.type. Name is the name visible in the Windows file-type browser. Finally, OpenAction defines the action to execute when a file with this extension is opened in the Windows explorer.