I did something like this using the `multiple-bibliographies` (along with 
the `citation-backlinks`) filter and a custom CSL file to create a linked 
index of authors and a glossary that worked both in LaTeX/PDF and HTML. So, 
perhaps, there is no need for an additional filter.

On Monday, May 15, 2023 at 5:32:37 AM UTC-3 BPJ wrote:

> There are LaTeX packages which support multiple indexes:
>
> https://ctan.org/topic/index-multi?lang=en
>
>  It would of course depend on how you generate the `\index{...}` commands 
> in Markdown.
>
> I have been thinking of writing a filter which (ab)uses citation syntax to 
> generate index commands in LaTeX and index links in HTML/Markdown + a file 
> from which an HTML/Markdown index can be generated with a script. Now that 
> you can run standalone scripts with `pandoc lua` the latter may be easier 
> to do.
>
> Den sön 14 maj 2023 17:32'Marek Stepanek' via pandoc-discuss <
> pandoc-...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> skrev:
>
>> Hello all,
>>
>> I have a huge file of a novel, with historic illustrations (Anna 
>> Karenina, in three languages). These illustrations are already indexed. But 
>> I would like to have a separate index from the origins of these pictures 
>> just before the bibliography. Would this possible in Markdown - probably 
>> with a Lua-Filter? Or in LaTeX inserted into Markdown?
>>
>> I would be very grateful for any hint
>>
>>
>> Marek Stepanek
>>
>> -- 
>> You received this message because you are subscribed to the Google Groups 
>> "pandoc-discuss" group.
>> To unsubscribe from this group and stop receiving emails from it, send an 
>> email to pandoc-discus...-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/pandoc-discuss/26DA151C-9D95-4558-BC46-8AD1BBC81E19%40googlemail.com
>> .
>>
>

-- 
You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/c19d9830-7623-44b3-94ad-24889e2498cen%40googlegroups.com.