Right now, when Calibre encounters an epub with this in its OPF file:
Code:
<dc:title id="maintitle">Great Title</dc:title>
<meta property="title-type" refines="#maintitle">main</meta>
<meta property="display-seq" refines="#maintitle">1</meta>
<dc:title id="subtitle">Usually a Very Long Subtitle</dc:title>
<meta property="title-type" refines="#subtitle">subtitle</meta>
<meta property="display-seq" refines="#subtitle">2</meta>
it parses it into title with the content "Great title: Usually a Very Long Subtitle"
When one converts the EPUB*with Calibre into EPUB, it transforms into:
Code:
<dc:title id="id">Great title: Usually a Very Long Subtitle</dc:title>
leading to a loss of information, as it is not longer clear (at least to a machine) what is the main title and what is the subtitle.
Given this notation is now used in e-books in the wild (after the
epub v3 specification no longer being a draft), is it not now time for Calibre to use it when writing epub files? The subtitle field would then need to be exposed in the UI too (a new column, a field in the "Edit metadata dialog" and probably elsewhere). I now use a custom column for it, but it is not an ideal solution.
Seems like I am not the only one interested in proper handling of subtitles:
https://www.mobileread.com/forums/sh...d.php?t=358483
https://www.mobileread.com/forums/sh...d.php?t=333157