That's what I was afraid of... No way to have the document self-consistent. 
(BTW: A YAML option turning YAML off could result in an error message, 
documenting the problem...).

Thanks anyway ; a quick and precise answer.

Back to the ol' drawing board...

--
Emmanuel Charpentier

Le samedi 28 septembre 2019 20:14:43 UTC+2, John MacFarlane a écrit :
>
> Emmanuel Charpentier <emanuel.c...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org <javascript:>> writes: 
>
> > I wondered what part of the options, extensions and template variables 
> can 
> > be specified in the YAML header of a Markdown file, thus ensuring that 
> the 
> > "right" set of options is used at compilation. However, I have been 
> unable 
> > to find a description of what can be specified at command line. 
>
> It wouldn't make sense to put formats  and extensions in the YAML 
> header: after all, whether a document can even HAVE a YAML header 
> is dependent on extensions.  What would you do if the YAML header 
> said to disable the yaml_metadata extension?  You'd have a 
> paradoxical document! 
>
> All template variables can be set via YAML metadata, because the 
> writers populate variables from metadata values. 
>
> Command-line options can never be set via YAML metadata, in general, 
> though in some cases it may seem as if they can.  For example, 
> you can specify `toc: true`; but this only works in formats where 
> the only thing the `--toc` option has to do is set a `toc` 
> template variable. 
>
> Rather than adding a comment to the source with installation 
> instructions, I usually use a simple Makefile: 
>
> output.html: input.md 
>              pandoc $< -o $@ --my-options-here... 
>
> This way, I don't have to remember what options to use. 
> I just type 'make' and it's done. 
>
>

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