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(Translated from German using Google Translate)
I hope I'm in the right place with my question.
I have two custom columns in Calibre. Both are hierarchically structured.
The first column has the following labels:
Lookup name: #genre.
Column heading: Genre.
Normally, only one (comma-separated) value appears. However, there are a few cases with more than one entry.
The first/top level consists of a "sort character" such as _, §, °, ≡, etc., followed by several sublevels, which are separated by "." as usual.
The contents of the second column have the following labels:
Lookup name: #genre_rg.
Column heading: Genre (ReadingGoal).
This should now be created in a "flattened" form from the values of the first column.
By "flattened," I mean the following:
- The sorting level should be filtered out.
- The second and third hierarchy levels should remain.
- The remaining levels should be ignored.
Here are some examples:
_.Belletristik.Roman.Spannung.Krimi.+nl → Belletristik.Roman
§.Sachbuch.Geschichte.Weltgeschichte.Menschheit → Sachbuch.Geschichte
#.Zeitschrift.Geschichte.Kultur.Menschliche → Zeitschrift.Geschichte
≡.Essayistisches.Kurzgeschichten.Reiseessays → Essayistisches.Kurzgeschichten
_.Belletristik.Roman.Cli-Fi, _.Belletristik.Roman.Dystopisch → Belletristik.Roman, Belletristik.Roman
§.Sachbuch.Gesundheit.Lebenshilfe.Beziehung.Sexual ität, Sachbuch.Wissen.Evolution.Mensch/Tier → Sachbuch.Gesundheit, Sachbuch.Wissen
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