validating error in epub

Report · Mar 07, 2017

i’ve exported an epub using Indesign CC 2015, reflowable txt. When I run it through EpubCheck I get the error: ERROR (HTM-004) : Irregular DOCTYPE: found '', expected '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'.

How can I fix my epub in order to get no errors in EpubCheck? I uploaded the epub to a selling point and it didn’t get accepted.

Yours sincerely, Joanna

Report · Mar 07, 2017

What version EPUB did you choose?

Report · Mar 07, 2017

Hello Bob,

version 2.0.1, first page as cover. The file this error occurs is: OEBPS/cover.xhtml

I tried it with a jpg file and a gif, the same error occurs.

Report · Mar 07, 2017

Try version 3.

Report · Mar 07, 2017

Okay, I’ve tried that. Now i’m getting a warning (not an error):

File: OEBPS/css/idGeneratedStyles_1.css

Line: 24

Position: 2

Message: CSS selector specifies absolute position.

I don’t know what the heck that means...

Report · Mar 07, 2017

Did you crack this thing open and do any work on it before trying to validate it?

Report · Mar 07, 2017

Nope, it’s exactly the same Indesign file, the only difference I exported it to EPUB 3 in stead of 2. But epub 3 is not always readable on older ereaders, isn’t it?

Adobe Community

validating error in epub