“Namespace prefix epub for type on a is not defined”

[actuallymentor]

Hello,

I am trying to use the EPUB3 provision for footnote popups by adding epub:type="noteref" to my footnote declarations.

In ibooks this results in the error in the title (screenshot attached).

I can see in your lib that you declare xmlns:epub=”http://www.idpf.org/2007/ops” which should make iBooks respect the epub namespace. I've inspected the epub itself and found the markup to indeed include xmlns:epub=http://www.idpf.org/2007/ops.

I did notice that http://www.idpf.org/2007/ops gives a 404. If this is an issue the link in your code should be update to whatever is the current live link.

I am using version 0.0.17 with { version: 3 }.

If you have any idea how to debug this it would be most welcome.

[pedrosanta]

Hi @actuallymentor, just merged #67 that will allow to properly user those attributes.

Just checked out and that http://www.idpf.org/2007/ops is indeed the correct URI for the spec and that it doesn't need to explicitly resolve to a page, it's just an identifier – which for me also sounds dumb, but, W3C XML computers overall weirdness I guess. 🤷‍♂️