What's in an EPUB 3 filename? Not much, it's all in the extension ... most of the time. on January 31, 2017 container.xml EPUB 3 Open Package Format opf +
EPUB2 to EPUB3: Lessons Learnt in Conversion on March 23, 2014 DTD EPUB2 EPUB3 HTML5 nav opf Sigil XHTML +