Quote:
Originally Posted by arspr
But I concede that maybe Kobo has specifically broken/removed it their hidden and unknown kepub specification as they have broken widows and orphans, page-break-whatever CSS property, support for several chapters (toc entries) in the same html file which plays wrong with the in-chapter page numbering and chapter jumping features,...
So yes, maybe they are not allowed in kepubs, even if kepubs are supposed to be better than epubs. Who knows.
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Actually, there is
https://github.com/kobolabs/epub-spec. It is as much a user guide for people submitting books as a spec, but it does have some details. The TOC section says that they will generate a TOC entry for any spine entry that is not in the TOC.ncx. As they do that, it doesn't surprise me that they would eliminate duplicate TOC entries.
I am with the others and feel it is an error in the book if there are two TOC entries pointing to the same place. I can't see the point. I do have books with multiple TOC entries pointing to the same page. These are for things like "Part I" followed immediately by "Chapter 1". They open the book to the same page, but are using different anchors.