Feature request: ability to create sets of custom properties collections

Hi,
it could be very nice to be able to create sets of properties like for example "Invoices" (amount, customer, taxes...), HR document (name, surname, position...) and to be able to link a set of properties to a folder or document. This sets  could be added to the Nextcloud "New document" function to add "New Invoice", "New HR document"...
Thanks,
Fred.