Problem with different metadata editing in opf

[homura_no_ko]

Hello, I have this problem where my epubs have completely different metadata editing in content.opf.
I don't use Calibre for any heavy editing, usually just add/edit title, series, author, tags metadata, and polish them afterwards.

Only, there's this problem.

I am using Marvin to read epubs on my iPhone 6s. The problem shows up when I add epubs to the app.
The thing is, half the epubs have the desired metadata and the other half is missing the metadata I painfully edited in Calibre.
Thinking that the problem must be in .opf I checked to find that:

The correctly showing metadata looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="uuid_id" version="2.0">
<metadata xmlns:calibre="http://calibre.kovidgoyal.net/2009/metadata" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns: opf="http://www.idpf.org/2007/opf" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<dc:title>TITLE, Vol. 07</dc:title>
<dc:creator opf:role="aut" opf:file-as="SURNAME, Name">Name Surname</dc:creator>
<dc: publisher>PUBLISHER</dc: publisher>
<dc:rights>&amp;#169; AUTHOR 2012</dc:rights>
<dc:contributor opf:role="bkp">calibre (3.15.0) [https://calibre-ebook.com]</dc:contributor>
<dc:identifier id="uuid_id" opf:scheme="uuid">3595bd16-f653-4514-8555-fc7956dec1bb</dc:identifier>
<dc:date>2017-12-18T20:30:00+00:00</dc:date>
<dc:subject>Magic</dc:subject>
<dc:subject>Science Fiction</dc:subject>
<dc:subject>Action</dc:subject>
<dc:subject>Modern Fantasy</dc:subject>
<dc:language>en</dc:language>
<dc:identifier opf:scheme="calibre">7137d345-8b97-4265-82a6-3fc1ac17bf73</dc:identifier>
<meta name="calibre:title_sort" content="TITLE, Vol. 07"/>
<meta name="calibre:series" content="TITLE"/>
<meta name="calibre:series_index" content="7.0"/>
<meta name="cover" content="cover"/>
<meta name="calibre:timestamp" content="2018-02-04T18:22:05+00:00"/>
<meta content="horizontal-lr" name="primary-writing-mode"/>
<meta name="calibre:author_link_map" content="{&quot;NAME SURNAME&quot;: &quot;&quot;}"/>
<meta name="calibre:user_metadata:#status" content="{&quot;colnum&quot;: 2, &quot;#extra#&quot;: null, &quot;category_sort&quot;: &quot;value&quot;, &quot;search_terms&quot;: [&quot;#status&quot;], &quot;display&quot;: {&quot;description&quot;: &quot;&quot;}, &quot;kind&quot;: &quot;field&quot;, &quot;datatype&quot;: &quot;bool&quot;, &quot;is_category&quot;: false, &quot;#value#&quot;: true, &quot;is_custom&quot;: true, &quot;is_multiple&quot;: null, &quot;table&quot;: &quot;custom_column_2&quot;, &quot;is_multiple2&quot;: {}, &quot;column&quot;: &quot;value&quot;, &quot;rec_index&quot;: 22, &quot;is_editable&quot;: true, &quot;is_csp&quot;: false, &quot;link_column&quot;: &quot;value&quot;, &quot;label&quot;: &quot;status&quot;, &quot;name&quot;: &quot;Status&quot;}"/>
</metadata>
<manifest>
...(excluded)
</manifest>
<spine toc="ncx" page-progression-direction="ltr">
...(excluded)
</spine>
<guide>
...(excluded)
</guide>
</package>


And the ones which metadata disappears when I add it to app:
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="pub-id" version="3.0" xml:lang="en" prefix="calibre: https://calibre-ebook.com">
<metadata xmlns:calibre="http://calibre.kovidgoyal.net/2009/metadata" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns: opf="http://www.idpf.org/2007/opf" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<dc:title id="id">TITLE, Vol. 07</dc:title>
<dc:creator id="id-1">AUTHOR SURNAME</dc:creator>
<dc:rights>Copyright © 2016 AUTHOR SURNAME</dc:rights>
<dc:identifier>calibre:882</dc:identifier>
<dc:identifier>uuid:9dd5ab9b-7046-429d-a19f-297865021b97</dc:identifier>
<dc:identifier id="pub-id">urn:uuid:e695aac4-3c2e-400b-9bb3-b1ba44ce5279</dc:identifier>
<dc:language>en</dc:language>
<dc:date>2018-03-08T00:00:00+00:00</dc:date>
<dc: publisher>PUBLISHER</dc: publisher>
<dc:subject>Fantasy</dc:subject>
<dc:subject>Magic</dc:subject>
<dc:subject>Humor</dc:subject>
<dc:subject>Adventure</dc:subject>
<opf:meta refines="#id" property="title-type">main</opf:meta>
<opf:meta refines="#id" property="file-as">TITLE, Vol. 07</opf:meta>
<meta name="cover" content="cover"/>
<meta name="calibre:timestamp" content="2018-03-10T21:37:39.073000+00:00"/>
<meta content="horizontal-lr" name="primary-writing-mode"/>
<opf:meta property="role" refines="#id-1" scheme="marc:relators">aut</opf:meta>
<opf:meta property="file-as" refines="#id-1">SURNAME, NAME</opf:meta>
<opf:meta property="belongs-to-collection" id="id-2">TITLE</opf:meta>
<opf:meta refines="#id-2" property="collection-type">series</opf:meta>
<opf:meta refines="#id-2" property="group-position">7</opf:meta>
<opf:meta property="calibre:author_link_map">{"AUTHOR SURNAME": ""}</opf:meta>
<opf:meta property="calibre:user_metadata">{
"#status": {
"#extra#": null,
"#value#": null,
"category_sort": "value",
"colnum": 2,
"column": "value",
"datatype": "bool",
"display": {
"description": ""
},
"is_category": false,
"is_csp": false,
"is_custom": true,
"is_editable": true,
"is_multiple": null,
"is_multiple2": {},
"kind": "field",
"label": "status",
"link_column": "value",
"name": "Status",
"rec_index": 22,
"search_terms": [
"#status"
],
"table": "custom_column_2"
}
}</opf:meta>
</metadata>
<manifest>
...(excluded)
</manifest>
<spine page-progression-direction="ltr" toc="ncx">
...(excluded)
</spine>
<guide>
...(excluded)
</guide>
</package>

I have no idea what to do, I tried to rewrite the opf, but when I saved it, closed edit book, then opened edit book again - any editing I did disappeared.

How should I solve it permanently? Is it even possible to do it within Calibre? I don't want to rewrite it all manually book by book.

Please

[ilovejedd]

You already mentioned doing Polish books so I assume there's just something in the latter's format that Marvin doesn't like.

Try installing the Modify ePub plugin and see if that helps clean up opf metadata. Try it with the Remove non dc: metadata elements option enabled. Iirc, Marvin doesn't know what to do with all of Calibre's extra metadata entries anyway. Only Title, Author, Publisher, Subject, and Date Published are relevant.

[jackie_w]

Your first book is EPUB2 and your second is EPUB3. The first line of the OPF file defines the version. Calibre inserts the correct version of the metadata to match the EPUB version. Perhaps Marvin can't handle EPUB3.

[ilovejedd]

Originally Posted by jackie_w

Your first book is EPUB2 and your second is EPUB3. The first line of the OPF file defines the version. Calibre inserts the correct version of the metadata to match the EPUB version. Perhaps Marvin can't handle EPUB3.

Marvin claims basic EPUB3 support but from threads I've seen, I don't believe it handles EPUB3 particularly well.