The strictest meaning of the term is to only accept male members of the families registered (introduced) in the Svenska Riddarhuset. Should unintroduced families be included as well (incl. House of Bernadotte)? How about women, who are accepted - daughters and perhaps wives (if not of noble birth)?
There were other noble corporations under Swedish rule, too. In the empire hayday, I think there were four other Houses of Nobility in the Swedish empire, namely Livonian, Courlander, Estonian and that of Saaremaa. In or out?
I think it would be a good idea to make the distinctions clear in the project description.
BR, Joni