Quote:
Originally Posted by enuddleyarbl
I know this is a bit silly, but is there any way to turn the warning back on for EPUB3 files not being XHTML?
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The W3C removed this check for both epub2 and epub3 files in EPUBCheck v5.0.0.
For more information see:
feat: no longer check .xhtml extension in EPUB 2.0.1
feat: any file extension is now allowed
If you want the check back, download
EPUBCheck v4.2.6, unzip it, go to the plugin folder and replace epubcheck.jar and the lib folder with the v4.2.6 versions.
You'll also might want to disable the update check. For more information see the first page. (You'll need to change
"github": true, to
"github": false,)