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KevinH · 02-13-2018, 10:42 PM

No in fact using different file types/extensions for text in the same epub is a huge pain in the ass. The epub3 standard recommends using only one: .xhtml. For epub2 you see both .xhtml and .html but the .html is a misnomer since proper xhtml is required.

Another problem is xhtml is xml but xml need not be xhtml. Any ebook author that tries to write chapters with mixed extensions is really just asking for trouble, imho.

I had never seen a book with a cover.xml followed by lots of .html or .xhtml files before. We can handle it but it really is not a good design approach for any ebook author.

02-13-2018, 10:42 PM	#14
KevinH Sigil Developer Posts: 8,873 Karma: 6120478 Join Date: Nov 2009 Device: many	No in fact using different file types/extensions for text in the same epub is a huge pain in the ass. The epub3 standard recommends using only one: .xhtml. For epub2 you see both .xhtml and .html but the .html is a misnomer since proper xhtml is required. Another problem is xhtml is xml but xml need not be xhtml. Any ebook author that tries to write chapters with mixed extensions is really just asking for trouble, imho. I had never seen a book with a cover.xml followed by lots of .html or .xhtml files before. We can handle it but it really is not a good design approach for any ebook author. Last edited by KevinH; 02-13-2018 at 10:54 PM.