I created an epub ebook using Robohelp 11, but I cannot get the file to pass epub check on this epub vaidator: EPUB Validator (beta) I get the following error: "External DTD entities are not allowed. Remove the DOCTYPE." Does anyone know how to resolve this error? The ibooks store will not accept the content with the error in the file.
Have a look at Matt Sullivan’s blog post on tricks that he discovered when publishing his textbook to EPUB - http://www.mattrsullivan.com/tcs/page/4/ - the link’s down right now, but I’ve e-mailed him to let him know.