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Doitsu · 06-02-2015, 04:24 AM

You'll need to add the declaration marked in Magenta to the document header:

Code:

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">

BTW, if you export a valid epub2 file with the Sigil epub3 plugin, it'll do it automatically for you. :-)
It'll also reformat/add other files for epub3 compatibly.

06-02-2015, 04:24 AM	#2
Doitsu Grand Sorcerer Posts: 5,731 Karma: 24031401 Join Date: Dec 2010 Device: Kindle PW2	You'll need to add the declaration marked in Magenta to the document header: Code: <?xml version="1.0" encoding="UTF-8" standalone="no" ?> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops"> BTW, if you export a valid epub2 file with the Sigil epub3 plugin, it'll do it automatically for you. :-) It'll also reformat/add other files for epub3 compatibly. Last edited by Doitsu; 06-02-2015 at 04:34 AM.