The scope is part of a control flow jump statement (i.e. a 'goto', 'continue', 'break', 'return') which enters or leaves a scope in the middle of it.
Knowing this is useful, because it means that inserting a statement before this node in the CFG does not correspond to inserting a statement before the scope joinpoint in the AST.
The scope is part of the normal control flow of the program (i.e. the next line of code to be executed was a '{' or '}').
The context of the flow in which the scope node is located.