EPUBCheck finds errors with footnotes

[Tobias]

EPUBCheck from W3C is throwing a lot of errors on a converted .docx to epub 2 file:

Referring to a footnote:

<a role="doc-noteref"

ERROR(RSC-005): book.epub/index_split_051.html(58,494): Validierungsfehler: Attribut "role" ist an diesem Element nicht erlaubt. Erlaubt ist nur das Attribut "accesskey", "charset", "coords", "dir", "hreflang", "lang", "rel", "rev", "shape", "style", "tabindex", "target", "type" oder "xml:lang"

I am surprised that the conversion tool seems to produce invalid epub2 xhtml?

Is this something that I should care about and correct or does it not matter?

[DNSB]

Perhaps that 'role' is an ePub3 element has something to do with the error. For your own use, simply removing the role="whatever"s will work.

Alternatively, have calibre generate ePub3 files.

[kovidgoyal]

https://manual.calibre-ebook.com/faq...e-is-not-valid

[Tobias]

I think @kovidgoyal 's reply hits it well, thank you!

From the link:

The EPUB I produced with calibre is not valid?

calibre does not guarantee that an EPUB produced by it is valid. The only guarantee it makes is that if you feed it valid XHTML 1.1 + CSS 2.1 it will output a valid EPUB. calibre tries hard to ensure that EPUBs it produces actually work as intended on a wide variety of devices, a goal that is incompatible with producing valid EPUBs, and one that is far more important to the vast majority of its users. If you need a tool that always produces valid EPUBs, calibre is not for you. This means, that if you want to send a calibre produced EPUB to an online store that uses an EPUB validity checker, you have to make sure that the EPUB is valid yourself, calibre will not do it for you – in other words you must feed calibre valid XHTML + CSS as the input documents.

[Tobias]

Originally Posted by DNSB

For your own use, simply removing the role="whatever"s will work.

I just got feedback from a publisher who told me to make sure the file is 100% valid, because otherwise there can be error messages from shops during distribution.

[Tobias]

I brought this into the bug tracker. It does not sit right with me that the role attribute is not removed, but also not intentionally added. Unfortunately @kovidgoyal is very quick with shutting down conversations.

https://bugs.launchpad.net/calibre/+bug/2072645