What a pity, that the specs are in some areas not clear. Well, I will insert the nav entry in spine, because otherwise Kobo will be "confused" (it does not show the cover, nor does the TOC work as I mentioned before).
I tried linear="no" - thanks for the hint, Doitsu.
In Kobo it has no effect. Still the content appears via page forward/back buttons.
And, as a note: the content of nav.xhtml will not be displayed like the content of content.xhml in Kobo. At nav.xhtml you find page margins. at content.xhtml you didn't.
There's a lot work for me to do: I will change to the Kobo forum, to get help about all these "effects" of the Kobo software. Hopefully there's a way to realize the CSS rule page-break: before for headings in a Kobo. If not, my clean and simple concept of "one content file does it all" could not be used.
As promised, I attached the complete minimal epub3 file in my first posting, to make it easy for readers to find the latest version.
Last edited by ibu; 03-09-2017 at 05:18 AM.
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