Feature request: multi-series/set management

[zoomming]

Please can you take into account the epub3 ability to manage multiple series/set? This is allowed by epub 3 standard, for instance with the following meta-data within the opf file:

Exemples are related to

• the 10th book in the serie _'BluePeriod'
• the 1st book in the 'Saga' serie

  ---

• <package...
• <metadata...
• 'Blue_Period'
• set
• 10
• 'Saga'
• series
• 1

This could also be made by refining the first collection :

---

- <package...
-   <metadata...
-     <meta property="belongs-to-collection" id="c01">'Blue_Period'</meta>
-     <meta refines="#c01" property="collection-type">set</meta>
-     <meta refines="#c01" property="group-position">10</meta>
-     <meta refines="#c01" property="belongs-to-collection" id="c02">'Saga'</meta>
-     <meta refines="#c02" property="collection-type">series</meta>
-     <meta refines="#c02" property="group-position">1</meta>

Display in the book info panel could be very similar to current implementation :

• 'Blue_Period'[10], 'Saga'[1]

As a minimal implementation, both set of books, i.e. 'Blue_Period' and 'Saga', shall be listed in the series filtering list. Other more complex display features could be foreseen, sure...