Hello, I've created a graphic novel I want to put onto the itunes bookstore. It's in the EPUB format and the contents of the book are 1000x1500. I've had to adjust the code inside the EPUB to get it to submit. With all of the code fixed, apple is giving me the error of
ERROR ITMS-9000: Missing prefix attribute in root (package) element of the OPF file. Please supply a prefix attribute with valid rendition value in root <package> element of the OPF file
Can someone explain what this means? Is there a simple standard line of code I need to insert into the opf to pass inspection?
