Subject FB 2.1: GTT explanation
Author Tetram Corp

I'm reading release notes, and I saw this about GTT:
"references between persistent and temporary tables are forbidden"

So it isn't possible to do something like this? if yes, is it possible
to know the reason?

create table t1 (
field integer unique

create global temporary table gtt (
field integer references t1(field)

or is there only a restriction about static tables referencing temporary?