Thanks a lot once more, chaley
What i need, first of all, is a hierarchical structure within one of the CC groups, what i actually have now in the group "tags" by simply syncing the corresponding books with the hierachical tags.
What i would not like to have is: to see all the other non-hierarchical tags that are assigned to my books as well. Those i'd like only to be visible in calibre but not in CC.
It seems that your last hint (create a custom column "Text, behaves like tags") won't give me a hierarchical structure in the group "cc_genres" like this:
cc_genres
--------->2
------------>a
--------------->b
...
BTW: What does "...
behave like tags" mean in this context?
Another approach could be to create a second hierachical structure for the sync to cc only:
- create a column like "cc_books", set it as a hierarchical one in calibre and cc,
- create a second hierarchy whithin and add to it the books that i want synced to cc
- in cc make only this column visible
The drawback would of course be to have 2 parallel structures.