Greetings,

I have been spending time pulling my hair and reducing my code and 
ambitions.
Now (based on the BlockCode example from my LUA code is simply reduced to :

function Span(s)
          s.identifier = "ggg";
end

I based that on examples I found here 
: https://issueexplorer.com/issue/lierdakil/pandoc-crossref/319
and based on the Span description from https://pandoc.org/lua-filters.html

My very obvious expectation is that any generated span element has a "ggg" 
identifier.
I don't know how I could define a more trivial function. However, nothing 
ever works.

This started with comparisons and real code. Since nothing works, I have 
reduced it to this oneliner, which still doesn't.

When I compile my (.tex) code (into epub), this continues producing  blocks 
such as :

<p><span id="fig:LettreChessCarleyCo" 
label="fig:LettreChessCarleyCo">[fig:LettreChessCarleyCo]</span></p>

My compilation is run with this command :
pandoc -L ../pandocLabelFilter.lua -Fpandoc-crossref -o ebook.epub epub.tex 
--epub-metadata=metadata.xml --epub-cover-image=IMG/couverture.jpg --toc 
--toc-depth=2 --resource-path=IMG/ --default-image-extension=jpg

../pandocLabelFilter.lua contains what I pasted above.

So, what must I do additionnally so that any LUA code accepts to be run for 
real ?

Thanks,

Vincent

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