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Yes!
To be honest, I rarely need to use this feature EXCEPT when tweaking (de-nesting) some commercial books.
While not incorrect, Why use all those added levels of Divs and Spans?
Having a simple stylesheet for the 'page type' seems so much nicer than:
Code:
<div class='body'>
<div class="chapter">
<div class=ChapterHead"> ... with even more nested divs...</div>
<div class="chapterbody">
Thankfully, most books are NOT coded this way
Having this feature
would help with Paragraphs that use (and need to) many <spans, some even nested.

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