Quote:
Originally Posted by DiapDealer
I would think that if you have no epub3-specific metadata needs, simply changing the package version in the OPF file would be enough to make it become an epub3.
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There are some metdata changes and/or additions that need to go into the OPF header. Also, you need to build a NAV ToC that also has to go into the OPF. And finally there is the code needed for the audio both in the OPF and XML.