_:vb1436905 . _:vb1436954 . "unstable" . _:vb1436905 _:vb1436954 . _:vb1436905 . _:vb1436954 _:vb1436836 . . "2021-08-08"^^ . . "1.1.1.3.2.7" . _:vb1436836 . "2023-03-14"^^ . "Deprecated according to the ammendment to the Regulation (EU) 2019/777. Optional ETCS functions which might improve operation on the line."@en . _:vb1436836 . "ETCS optional functions"@en . . "true"^^ .