After using "Update metadata" susequent checks for non dc:metadata and a removal with "Modify ePub" produces here:
Code:
Modify ePubs
Logfile for book ID 1810 (Wie Gewinne Ich Das Herz Eines Mannes?)
1810
Modifying: c:\users\monk\appdata\local\temp\calibre_0.8.24_tmp_yujz8v\afi01x_modify_epub\1810.epub
Looking for non dc: elements in manifest
Removing child: {http://www.idpf.org/2007/opf}meta
Removing child: {http://www.idpf.org/2007/opf}meta
Removing child: {http://www.idpf.org/2007/opf}meta
Removing child: {http://www.idpf.org/2007/opf}meta
ePub updated in 0.36 seconds
The corresponding content.opf contains following metadata:
Code:
<?xml version="1.0" encoding="UTF-8"?>
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="BookId" version="2.0">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:opf="http://www.idpf.org/2007/opf">
<dc:creator opf:role="aut" opf:file-as="Sander, Christian">Christian Sander</dc:creator>
<dc:identifier id="BookId" opf:scheme="UUID">urn:uuid:0c3b2201-a5ae-4d07-be7f-84a3451f0ed9</dc:identifier>
<dc:title>Wie Gewinne Ich Das Herz Eines Mannes?</dc:title>
<dc:publisher>Blue Point Trading</dc:publisher>
<dc:identifier opf:scheme="ISBN">9783037990001</dc:identifier>
<dc:date>2011-10-05T22:00:00+00:00</dc:date>
<meta name="calibre:title_sort" content="Wie Gewinne Ich Das Herz Eines Mannes?"/>
<meta name="calibre:rating" content="8"/>
<meta name="calibre:user_categories" content="{}"/>
<meta name="calibre:author_link_map" content="{"Christian Sander": ""}"/>
<dc:language>de</dc:language>
</metadata>
Sidenote: This is a book I converted from pdf to epub using Sigil 0.4.2
I can provide a sample when needed. Just PM me.
Kind regards