Why I see this in v_$datafile's view statement? It looks like the v_$datafile is a view for v$datafile. Right?

create or replace view sys.v_$datafile as
select "FILE#","CREATION_CHANGE#",
"CREATION_TIME","TS#",
"RFILE#","STATUS","ENABLED",
"CHECKPOINT_CHANGE#","CHECKPOINT_TIME",
"UNRECOVERABLE_CHANGE#","UNRECOVERABLE_TIME",
"LAST_CHANGE#","LAST_TIME","OFFLINE_CHANGE#","ONLINE_CHANGE#",
"ONLINE_TIME","BYTES","BLOCKS","CREATE_BYTES","BLOCK_SIZE",
"NAME","PLUGGED_IN"
from v$datafile;