I tried submitting my first epub to iBooks and got this error:
ERROR ITMS-9000: "Shankle.epub: OEBPS/Text/introduction.xhtml(11): value of attribute "id" is invalid; must be an XML name without colons
Here's the code from introduction.xhtml, line 11:
<p class="pfirst"><span class="PageNumber" id="13">Page 13</span> It is the purpose of this book to record the facts about the various state names. nicknames, flowers, trees, flags, birds, songs, seals, mottoes, capitol buildings, and some of the outstanding state histories.</p>
I'm confused; there are no colons in my code. It's just
id="13". My epub shows no errors in Epub-Checker. Does anyone know what this error means?