Specify sets in provider registry

[Freund-J]

Hello and thank you for your very helpful program! I would like to ask if it would be possible to store not only the providers in the provider registry database, but also individual sets?

I would be interested in only harvesting specific sets from different providers on a regular basis and store the metadata files for each set into a separate folder, e.g.

provider 1, set 1a, folder_1, date_lastHarvest_1a
provider 1, set 1b, folder_2, date_lastHarvest_1b
provider 2, set 2a, folder_3, date_lastHarvest_2a
provider 3, set 3a, folder_4, date_lastHarvest_3a
provider 3, set 3b, folder_5, date_lastHarvest_3b

If you could tell me if this is already possible (and I just overlooked it) or if you see the chance that this feature could be implemented, you would help me a lot.

(Regarding the provider setup in the database, I noticed one more small thing in the documentation: It is described that there is an optional --directory argument when adding a provider in the database. This option only works for me if I rename the argument --directory into --dir.)

Thank you very much in advance and kind regards.