Error Submitting EPUB to the itunes Store.

[TheFrog]

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?

[Karellen]

Which editor are you using - Calibre or Sigil?

Can you post the contents of the opf.

[TheFrog]

Originally Posted by Karellen

Which editor are you using - Calibre or Sigil?

Can you post the contents of the opf.

<package xmlns="http://www.idpf.org/2007/opf" version="3.0" xml:lang="en" unique-identifier="unique-id">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms">
<dc:title id="title">Book Title</dc:title>
<dc:creator id="id">My Name</dc:creator>
<dc:identifier>calibre:94</dc:identifier>
<dc:identifier>uuid:BLANK</dc:identifier>
<dc:identifier id="unique-id">urn:uuid BLANK</dc:identifier>
<dc:contributor id="encoder">CLIP STUDIO PAINT EX 2.0.0</dc:contributor>
<dc:language>en</dc:language>
<dcublisher>My Name</dcublisher>
<meta refines="#title" property="title-type">main</meta>
<meta refines="#title" property="file-as">Book Title</meta>
<meta property="dcterms:modified">2023-08-10T17:36:26Z</meta>
<meta property="rendition:layout">pre-paginated</meta>
<meta property="rendition:spread">landscape</meta>
<meta name="original-resolution" content="1000x1500"/>
<meta name="RegionMagnification" content="false"/>
<meta name="primary-writing-mode" content="horizontal-lr"/>
<meta name="book-type" content="comic"/>
<meta refines="#encoder" property="role" scheme="marc:relators">mrk</meta>
<meta refines="#id" property="role" scheme="marc:relators">aut</meta>
<meta refines="#id" property="file-as">My Name</meta>
</metadata>
<manifest>
I changed the personal info and UUID is blank, there is a number, but im not sure if that should be shared or not. I used calibre to edit the epub code.

[Karellen]

Originally Posted by TheFrog

<package xmlns="http://www.idpf.org/2007/opf" version="3.0" xml:lang="en" unique-identifier="unique-id">

<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms">

Sorry, I missed your post. (No pings in this forum)

I think the problem lies in the first tag. It should include the following...

<package xmlns="http://www.idpf.org/2007/opf" version="3.0" unique-identifier="uuid_id" prefix="calibre: https://calibre-ebook.com">

Even the second tag could do with an update...

<metadata xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:opf="http://www.idpf.org/2007/opf" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:calibre="http://calibre.kovidgoyal.net/2009/metadata" xmlns:dc="http://purl.org/dc/elements/1.1/">

Does that fix the issue?