Hello Mr. Krewinkel,
thank you for your help. The filter works great! The export option has made 
no difference for me, but I might be using it wrong (as it is always with 
me, I am learning working with Emacs, so I am probably doing something the 
way I shouldnt :D).
The second part is difficult for me. Could you elaborate a little more 
about how did you identified that those `'todo'` or `'TODO'` in the 
TODO-Span as classes, and not attributes? This might be silly question, I 
guess this is somehow inspired by HTML, but it would be really helpfull for 
me to know how this element is represented in pandoc AST.
And the element [String "TODO"] is a one-element list in pandoc-AST, 
therefore it cannot be chacked as-is? Did I got the last part correctly?
Regards, Tomas

Dne čtvrtek 5. listopadu 2020 v 22:31:07 UTC+1 uživatel Albert Krewinkel 
napsal:

> krulis....-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org writes:
>
> > I am using pandoc to convert `org-agenda` list of todos to `docx` and 
> `pdf`
> > for my coworkers. File exported from `emacs org-agenda` can look like 
> that
> > (simplified):
> >
> > `tasks.org`
> > ```
> > * TODO Feed the cat
> > ```
> >
> > Pandoc native output of this file parsing is:
> >
> > ```
> > [Header 1 ("feed-the-cat",[],[]) [Span ("",["todo","TODO"],[]) [Str
> > "TODO"],Space,Str "Feed",Space,Str "the",Space,Str "cat"]]
> > ```
> >
> > Now if I convert this to any output format, I get spurious "TODO" pandoc
> > strings (that are present from `org-mode`). How can I get rid of this
> > "TODO" string (preferably also with surrounding spaces)?
>
> Two options:
>
> 1. The org reader recognizes most org export options. So adding the
> following line to your input file should be enough:
>
> #+OPTIONS: todo:nil
>
> See: https://orgmode.org/manual/Export-Settings.html
>
> 2. With a Lua filter you'll want
>
> function Span (span)
> if span.classes:includes 'todo' then
> return {} -- delete this element
> end
> end
>
> > So, how can I access, or match, `pandoc Span` elements based on their
> > content? Where can I read more about this?
>
> _Just_ on their content is difficult for various reasons, but you can
> compare AST elements using the normal `==` Lua operator. The comparison
> of elements happens in Haskell, where elements don't have identity.
>
> So `pandoc.Span {pandoc.Str 'hi'} == pandoc.Span {pandoc.Str 'hi'}`
> would be true, but `{pandoc.Str 'hi'} == {pandoc.Str 'hi'}` would be
> false, as lists are note treated as AST elements. We might change that
> at some point.
>
> HTH,
>
> --
> Albert Krewinkel
> GPG: 8eed e3e2 e8c5 6f18 81fe e836 388d c0b2 1f63 1124
>

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