Grimborg - there's some magic in the either the metadata.xml or the content.opf that is enabled when you set your device output profile in calibre to a Sony.
In an example metadata.xml here there's this fragment:
Code:
<dcterms:conformsTo rdf:resource="http://xmlns.sony.net/e-book/prs/periodicals/1.0/newspaper/1.0"/>
<dcterms:type rdf:resource="http://xmlns.sony.net/e-book/prs/datatype/newspaper"/>
<dcterms:type rdf:resource="http://xmlns.sony.net/e-book/prs/datatype/periodical"/>
and in content.opf there's this:
Code:
<meta name="calibre:publication_type" content="periodical:unknown:Autosport"/>
Look for references to "sony" in calibre/ebooks/epub/periodical.py in the calibre source if you want more details.
For some reason, only a few (maybe one in ten?) periodicals open for me in "periodical mode". The rest appear just like normal epubs. I have no idea why this happens!
Cheers,
Simon.