conversion from epub to mobi and docx does not export series tag

[dbojan]

Hello.
When I try to convert ebook from epub format to to mobi and docx format, exported files do not have series tag, which is present in the original file:

ebook-meta.exe City of Illusions - Ursula K. LeGuin.epub (original file):
Title : City of Illusions
Title sort : City of Illusions
Author(s) : Ursula K. LeGuin [LeGuin, Ursula K.]
Publisher : Gateway
Book Producer : calibre (2.38.0) [http://calibre-ebook.com]
Tags : Science Fiction & Fantasy, Science Fiction
Series : Ekumen #3
Languages : eng
Rating : 4
Published : 2015-10-02T00:00:00+00:00
Identifiers : amazon:B011A4SVSC
Comments : <p>Earth, like the rest of the Known Worlds, has fallen to the Shing. Scattered here and there, small groups of humans live in a state of semi-barbarism. They have lost the skills, science and knowledge that had been Earth's in the golden age of the League of Worlds, and whenever a colony of humans tries to rekindle the embers of a half-forgotten technology, the Shing, with their strange, mindlying power, crush them out. There is one man who can stand against the malign Shing, but he is an alien with amber eyes and must first prove to paranoid humanity that he himself is not a creature of the Shing.</p><p>**</p>

ebook-meta.exe City of Illusions - Ursula K. LeGuin.docx (conversion #1):
Title : City of Illusions
Author(s) : Ursula K. LeGuin [LeGuin, Ursula K.]
Publisher : Gateway
Tags : Science, Fiction, &, Fantasy, Science, Fiction
Languages : eng
Comments : <p>Earth, like the rest of the Known Worlds, has fallen to the Shing. Scattered here and there, small groups of humans live in a state of semi-barbarism. They have lost the skills, science and knowledge that had been Earth's in the golden age of the League of Worlds, and whenever a colony of humans tries to rekindle the embers of a half-forgotten technology, the Shing, with their strange, mindlying power, crush them out. There is one man who can stand against the malign Shing, but he is an alien with amber eyes and must first prove to paranoid humanity that he himself is not a creature of the Shing.</p><p>**</p>

ebook-meta.exe: City of Illusions - Ursula K. LeGuin.mobi (conversion #2):
Title : City of Illusions
Author(s) : Ursula K. LeGuin
Publisher : Gateway
Book Producer : calibre (4.17.0) [https://calibre-ebook.com]
Tags : Science Fiction & Fantasy, Science Fiction
Languages : eng
Published : 2015-10-02T00:00:00+00:00
Identifiers : mobi-asin:f05626b0-7dd9-41d8-9cff-036ea953a69b
Comments : <p>Earth, like the rest of the Known Worlds, has fallen to the Shing. Scattered here and there, small groups of humans live in a state of semi-barbarism. They have lost the skills, science and knowledge that had been Earth's in the golden age of the League of Worlds, and whenever a colony of humans tries to rekindle the embers of a half-forgotten technology, the Shing, with their strange, mindlying power, crush them out. There is one man who can stand against the malign Shing, but he is an alien with amber eyes and must first prove to paranoid humanity that he himself is not a creature of the Shing.</p><p>**</p>


Series and series # is missing in docx and mobi.
Docx supports "custom properties" tags, which could be used for series.
They can be viewed/edited by wps office writer (free program), or ms word.
They can be of various types: text, number, date, boolean (yes/no).
Could support for .docx custom tags be added to calibre-meta, too?
More info on custom properties: https://support.office.com/en-us/art...4-1dd4622c6b75


Or atleast subject field in docx could be used, which is not used during conversion.
(calibre-meta sees subject field as another keyword tag.)

Or tags in calibre (called keywords in docx) could be used for extra tags.

Not sure about mobi.

Please write if I should post this somewhere like on the bugs/issues page.

[kovidgoyal]

Neither of those formats supports series metadata.