Another question about code details inside the OPF:
Sigil generates the part with the metadata like this:
Code:
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:opf="http://www.idpf.org/2007/opf">
<dc:title xmlns:dc="http://purl.org/dc/elements/1.1/">Lorem Ipsum</dc:title>
[...]
</metadata>
Is it really necessary, that in each child element of the element metadata the
Code:
xmlns:dc="http://purl.org/dc/elements/1.1/"
has to be inserted?
The validator epubcheck says: no.