Originally Posted by cybmole
I have a book , now in epub which probably came originally from pdf as the text flow is poor in some places.
I'd like to force calibre to try & improve matters, But I read somewhere that structure detection is not applied when the source is epub.
so do I need do 2 more passes i.e. go epub to ? and then ? back to epub and what format should the intermediate ? be please
or is my whole concept simply wrong/not workable ?
You mention bad text flow and a desire for improved structure detection. It sounds to me like you just want to edit the EPUB to fix some earlier conversion problems? I'd open it up in Sigil or explode it with Tweak Epub and change what you want. (If you're really looking for structure detection, you should be able to use the XPath capabilities built into Calibre.)