(general/all types) Subsystem flag, simplified
Separated Subsystem, Prism Subsystem, and Nested Subsystem flags
Separated Subsystem - A group of alters that have one or more things that tie them together, despite all having their own internal bodies.
The most common reasons a group of alters would be considered a separated subsystem are usually either, there are strong communication and/or memory barriers between them and the rest of the system. And/or they all split from the same alter and/or formed at the same time for the same reason.
Prism Subsystem - A term we have been using to describe one of our subsystem. More or less meaning a subsystem that often function like a nested subsystem, however alters may sometime leave the shared body, and begin functioning like a separated subsystem. Before returning to their previous state.
Nested Subsystem - A group of alter that share a internal body and usually function similarly to how systems function in the outer world. This is the type most usually think of when the hear the word subsystem.