[tinmug]

Thanks.
I've been using ePub 3. The resulting ePub yields (of course) a doc.xhtml. Establishing that as the Table of Contents file (Add Semantics ... Table of Contents) does create an entry in the OPF file. But this alone doesn't appear to be enough (or entirely) correct for the Kindle to see it/link to it.

The OPF entry reads:
<reference href="Text/toc.xhtml" title="Table Of Contents" type="toc"/>

Whereas the standards document refers to (an example of):
<item id="toc" properties="nav" href="xhtml/toc.xhtml" media-type="application/xhtml+xml"/>

Another ePub that I have looked into, and one that does successfully convert all elements to Mobi, has the same elements in the OPF TOC entry, except that it refers to HTML, not XHTML.

Haven't had luck with variations on this. Any comments from your side in this regard much appreciated.

Thanks.