Thread: [Plugin] ePub3-itizer - epub3 output plugin for Sigil
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Old 01-11-2016, 09:19 PM   #172
KevinH
Sigil Developer
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The .html extension (vs .xhtml) is perfectly legal in epub 3. If epubcheck or any other validator complains with anything other than an info, the validator is wrong.


Edit:
I partially take that back... the IDPF does say "SHOULD" and not "MUST" (See their official definitions at the start on the epub 3 docs)

› The XHTML Content Document filename SHOULD use the file extension .xhtml.

So I guess a validator giving a warning or info about it is okay, but it should not error out.

KevinH
Last edited by KevinH; 01-11-2016 at 10:07 PM.
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