Indeed, it exists already for Divs: 
https://github.com/pandoc/lua-filters/tree/master/not-in-format . Shouldn't 
be too difficult to adapt it to Spans, though the markdown will become 
heavy: 

This text [but not this comment]{.not-in-format .revealjs} appears on the 
slide.

Best,

On Monday, March 20, 2023 at 7:13:23 PM UTC Amy de Buitléir wrote:

> One idea that might help, would be to put any conditional output in a div 
> or span, and assign it a special class, e.g. "pdf-only".
>
> Then all you need is a pandoc filter that removes all divs or spans with 
> that class. That would be a generic filter that I think a lot of people 
> could find a use for, and it's just a few lines of code.
>
> On Monday, 20 March 2023 at 16:49:41 UTC Julien Dutant wrote:
>
>> If I understand well, the idea is to convert the following into two 
>> different outputs, depending on whether the output format is revealjs/pptx 
>> vs pdf?
>>  
>> ``` markdown
>>  
>> Text text !!important claim here!! text text text text text
>> text text text text text text text text text text
>> text text text text text
>>  
>> * Point 1 text text text text
>> * Point 2 text text text text
>>  
>> ```
>>  
>> Would remain the same in pdf (or other document format) output, except 
>> that the `!! ... !!` content would be highlighted, while in slide output 
>> formats it would be converted to the following:
>>  
>> Would be converted to the following in slide ouputs:
>>  
>> ``` markdown
>> important claim here
>>  
>> * Point 1 text text text text
>> * Point 2 text text text text
>>  
>> ::: notes
>> Text text important claim here text text text text text
>> text text text text text text text text text text
>> text text text text text
>> :::
>> ```
>>  
>> You'd have to write a Pandoc filter to do that ( 
>> https://pandoc.org/lua-filters.html ). It would make your work easier to 
>> use Span and Div markup rather than !! ... !!:
>>  
>> Text text [important claim here]{.imp} text text text text text
>> text text text text text text text text text text
>> text text text text text
>>  
>> For the document, there's only highlighting to be done, that's fairly 
>> easy. For the slides, you need some restructuring of content, that's less 
>> trivial (replace the paragraphs with their important bits, saving the 
>> paragraphs along, and placing them at the end of the slide in a notes Div) 
>> but it can be done.
>>  
>> What's not clear to me is whether many people would use it. It seems 
>> pretty rigid: keep all the lists, remove all the paragraphs unless marked, 
>> the slide text must be verbatim in the document text (instead of 
>> summarizing it, for instance.
>>  
>> Best, 
>>
>> Julien
>>
>> On Monday, March 20, 2023 at 1:08:28 PM UTC Amy de Buitléir wrote:
>>
>>> Pandoc supports speaker's notes, if that's what you're looking for. See 
>>> https://pandoc.org/MANUAL.html#speaker-notes
>>>
>>> On Sunday, 19 March 2023 at 13:19:57 UTC Aldo “Scias” wrote:
>>>
>>>> ¿Existe esta opción para convertir a diapositiva y documento?
>>>>
>>>> *Markdown with markup for relevant parts within a paragraph. !!Text!!*
>>>> Markdown con marcado para partes relevantes dentro de un párrafo. 
>>>> !!Texto!!
>>>> [image: import.png]
>>>>
>>>> Slide with the important parts and the containing paragraph as speaker 
>>>> notes.
>>>> Diapositiva con las partes importantes y el párrafo contenedor como 
>>>> notas del orador.[image: presentation.png]
>>>> Text document with the document and the important parts without 
>>>> modifications.
>>>> Documento de texto con el documento y las partes importantes sin 
>>>> modificaciones.
>>>> [image: document.png]
>>>> Benefit:
>>>> One markdown for two documents.
>>>> Another option is to create options to convert the entire document or 
>>>> for the summary or important parts of the content.
>>>>
>>>> Beneficio:
>>>> Un markdown para dos documentos.
>>>> Otra opcion es crear opciones para convertir el documento entero o para 
>>>> el resumen o partes importantes del contenido. 
>>>>
>>>>

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