I have a book with over a hundred footnotes that I converted to endnotes in the print version using a script created by Peter Kahrel.
Now, Amazon requests bi-directional links to validate my ebook. And prefers using footnotes to enhance the reader experience.
The Kindle guidelines suggest the following html, but I don’t know where to put it!
<p>This footnote example uses the aside element with the epub:type attribute and bi-directional hyperlinks.<sup>1</sup></p>
…
<aside id=”ft-1-1″ epub:type=”footnote”>
<p>1. This is the footnote text, which should be placed at the end of the chapter or book.</p>
</aside>