the only string parsing is 'a.b.c', which is mostly equivalent to T.a.b.c so you can completely ignore that capability the very slight difference is that using

the only string parsing is 'a.b.c', which is mostly equivalent to T.a.b.c so you can completely ignore that capability the very slight difference is that using T you must be explicit about attribute access vs key access whereas 'a.b.c' will try both