An easy way to do this is to:
- Mark your Chapters and sub-Chapters in the doc file with one of the MS built-in styles called 'Heading 1', 'Heading 2', ..., 'Heading 6'. 'Heading 1' equates to the HTML tag <h1>, 'Heading 2' to <h2> etc
- Save the doc as Webpage-filtered (rather than Webpage) and import the html file into Calibre.
- When you convert in Calibre you use what you did in step 1 to set the box called 'Detect chapters at' on the Convert - Structure Detection page. For example:
- If you mark Chapters with style 'Heading 2' then set the 'Detect chapters at' box to //h:h2 This will give you a proper external metadata TOC in the converted epub.
- A slightly more complex example...if your book has Sections and Chapters and you want a 2-level nested metadata TOC. Mark the doc Sections with style 'Heading 2' and the Chapters with style 'Heading 3'. When you convert set the 'Detect chapters at' box to //*[name()='h2' or name()='h3']
On the Convert - TOC page set the 'Level 1 TOC' box to //h:h2 and the 'Level 2 TOC' box to //h:h3
Hope this helps
