In your ebook example, they're using footnote code in the text like this:
Code:
<p>[...] una volta all’anno per il Seder<a href="../Text/footnotes.xhtml#footnote-0004"><sup>4</sup></a><a id="fnreturn-0004"></a>. [...]</p>
And this is the footnotes.xhtml:
Code:
<div class="footnote" id="footnote-0004">
4)
<p><em>Seder</em>: cena rituale legata della Pasqua ebraica (in cui si bevono vari bicchieri di vino, in seguito alle benedizioni). <a href="../Text/content0041.xhtml#fnreturn-0004"> <strong>↵</strong></a></p>
</div>
Not the cleanest code (or best way to do footnotes), but I don't see anything broken here. It
should jump you to the proper locations back/forth.
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Side Note: I'd recommend reading through my posts in:
It's better to KISS (Keep It Simple, Stupid). The simpler the code, the more likely it is to work across all readers without a problem.
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For example...
Your Chapter01.xhtml:
Code:
<p>This is an example.<a href="../Text/Endnotes.xhtml#fn1" id="ft1">[1]</a></p>
Your Endnotes.xhtml:
Code:
<p class="footnote"><a href="../Text/Chapter01.xhtml#ft1" id="fn1">[1]</a> An example footnote.</p>
Simple <a> goes one way, simple <a> goes back the other way. Bing, bang, boom, it works everywhere!
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Complete Side Note: You may also want to take a look closely at your EPUB Metadata... there is a whole bunch of gibberish in there, like Hebrew in your "source":