Re: filter for ePub footnotes

[BP Jonsson <bpjonsson-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Den 2017-08-23 kl. 16:17, skrev John MacFarlane:
> What you want isn't a filter, since the footnote marker is
> only created by the writer.

I once wrote a filter which intercepted all notes and replaced 
them with a note reference with a link to a div somewhere else in 
the document which contained the note text, in an item of an 
ordered list, with a link back to the note reference,
i.e. essentially the kind of structure which the HTML writer 
creates for links, except that you could put placeholder 
paragraphs anywhere in the document which were replaced with a div 
containing a list with the text of all notes since the last 
placeholder, which allowed me to put notes at the end of sections,
and to 'localize' notes in a table with the note texts below the 
table and the notes numbered alphabetically rather than with 
'arabic' numbers. There were no Note objects at all in the JSON 
returned to the writer. It could easily be adapted to use Unicode 
superscripts if desired.

/bpj