Thread: Where do displayed chapter titles come from?
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Old 10-16-2020, 01:35 PM   #4
JSWolf
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Quote:
Originally Posted by jhowell View Post
Technically your book has no chapters so calibre is creating its own from the file names.

For EPUB 2 you need to create an NCX file. For EPUB 3 you need a navigation document, with NCX being an optional fallback.
The ePub 3 needs an NCX to be backwards compatible with ePub 2. So IMHO, if the ePub 3 is not using any specific ePub 3 features that would break with ePub 2, then an NCX is necessary.
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