—
Kind Regards
Jostein Kjønigsen

> On 4 Sep 2025, at 07:31, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> 
>> (SLNX-files not added to any auto-mode-list, because I couldn't
>> find where/if that is done in the nxml-mode codebase).
> 
> It's in files.el, where auto-mode-list is set up:
> 
>    ("\\.x[ms]l\\'" . xml-mode)
> 
> and "C-h f xml-mode RET" says
> 
>  xml-mode is an alias for ‘nxml-mode’ in ‘nxml-mode.el’.

Thanks!

Attached is a patch which also includes this: