[Libreoffice-bugs] [Bug 114164] EPUB Export: Headings Levels other than Heading 1 are omitted in Outline

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=114164

--- Comment #3 from Kevin Suo <suokunlong at 126.com> ---
These are very good epub3 samples:
http://idpf.github.io/epub3-samples/30/samples.html

Among these, the 2nd one, "Children's Literature", seems to have a multi-level
TOC. The source codes for this epub can be found at:
https://github.com/IDPF/epub3-samples/tree/master/30/childrens-literature/EPUB

I did a brief analysis of the toc.ncx, and find that the implementation is
simple: (i.e., navPoint inside navPoint)
<navPoint id="np-319">
        <navLabel>
                <text>190 A FOUR-LEAVED CLOVER</text>
        </navLabel>
        <content src="s04.xhtml#pgepubid00503"/>
        <navPoint id="d1e54">
                <navLabel>
                        <text> I. The Rabbi and the Diadem </text>
                </navLabel>
                <content src="s04.xhtml#pgepubid99001"/>
        </navPoint>
        <navPoint id="d1e60">
                <navLabel>
                        <text> II. Friendship </text>
                </navLabel>
                <content src="s04.xhtml#pgepubid99002"/>
        </navPoint>
        <navPoint id="d1e66">
                <navLabel>
                        <text> III. True Charity </text>
                </navLabel>
                <content src="s04.xhtml#pgepubid99003"/>
        </navPoint>
        <navPoint id="d1e72">
                <navLabel>
                        <text> IV. An Eastern Garden </text>
                </navLabel>
                <content src="s04.xhtml#pgepubid99004"/>
        </navPoint>
</navPoint>

Also, you do not need to separate the sub-sections. Set a "name=pgepubid99001"
in the target heading and use sth like src="s04.xhtml#pgepubid99001" in the
TOC.

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