Isolated Spaces are similar to domain expansions of anime/manga, the only potential difference being the differing types and the difficulty in the creation of domains. Terms and definitions are obviously up for change, but it at least gets the idea of it across.

My idea for categories are Realm, Domain, Zone.

Realms are self-regulating and stable, so long as no external forces act on it. They have a core to support it's energy needs.

Domains are tied to an anchor Will, who acts as the source of energy for the Domain. Once they are created, they only require occasional maintenance to keep stable. Domains can be inherited or gifted, a Domain is inherited if received at the time of the owners death, while it is gifted if the owner personally transfers it. While a previous owner remains alive, they still can still exert some control over the Domain.

Zones are temporary spaces that require a conscious effort to maintain, they mimic the area they were created in.