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Old 01-07-2021, 10:50 PM   #3
DNSB
Bibliophagist
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Posts: 46,754
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Join Date: Jul 2010
Location: Vancouver
Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos
Mend and prettify or just Mend will add the missing doctypes. The CSSUndefinedClasses plugin is not happy with running against an epub with those errors so I've been using Mend to fix the issue.

Looking at your scrambled epub, the first block is before mend and prettify, the second is after.

Code:
<?xml version='1.0' encoding='utf-8'?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="en-us" xml:lang="en-us">
  <head>
Code:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="en-us" xml:lang="en-us">
<head>

Last edited by DNSB; 01-07-2021 at 10:53 PM.
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