That seems like a text format on its own? doesn't even use RS/FS. Even when Translating it uses { (),; } that's 4 characters to indicate a tree. Maybe you could

That seems like a text format on its own? doesn't even use RS/FS. Even when Translating it uses { (),; } that's 4 characters to indicate a tree. Maybe you could use FS=, RS=; GS=( US=) Is that what you mean?