Comment 4 for bug 1339766

Yes, I was referring to the Check Book tool, which did look a lot like a validator to me. Sorry if I got that wrong.

As for the check: I was just confused because there was no error message for the <item> tag when used with “src” and a url even if the specified resource was outside the book.
What if the Check Book tool would mark a missing “href” attribute inside an <item> tag as an error? That would help a lot and not just for remote resources.

Thanks for the fast replies and the generally awesome epub editor you included in calibre.