Quote:
Originally Posted by davidfor
Unfortunately, it's one of those things that I have to look at each time. I'm not completely sure what the rules are and don't do it enough to remember them off the top of my head. But, there are several discussions here and in the calibre forum about it. At least one has a sample book I have fiddled with when testing. I think a lot of the rules are in it.
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There is a spec in github.com/kobolabs. They have an epub spec with the footnote heuristic rules.