Gday, I'm getting close to publishing my book (a DOCX converted to EPUB with Calibre) and have used a couple of validators (
https://epubcheck.mebooks.co.nz/ and the offline Pagina). Both are returning an error (74, actually) which says:
Quote:
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WARNING: content.opf(23,86): XHTML Content Document file name 'index_split_000.html' should have the extension '.xhtml'.
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Otherwise, no errors.
I've checked the EPUB in the Kindle Previewer and sideloaded it to ibooks (on my ipad) and Kobo and it looks great.
I'd be grateful if someone could advise whether this error is acceptable and if not, what I have to do with Calibre to rectify the error.
Thanks and Cheers, Al