I've made an ePub book with Sigil, and ePubValidator (
http://threepress.org/document/epub-validate/) gives this error:
ERROR: Origino de specioj.epub/OEBPS/Text/content022.xhtml(94): attribute "span" not allowed at this point
I cannot find anything wrong. Does someone know how to interpret the number (94) behind the page name? I thought it might be the 94th line, but the 94th line from Sigils point of view is empty. 94th character in the file doesn't make sence either ...