 As of mid-2018 the Bach digital website started to implement the new numbers of the 3rd edition of the Bach-Werke-Verzeichnis, which has been announced for publication in 2020.For example, the Leipzig version of the "Christ lag in Todes Banden" cantata used to be BWV 4 in previous versions of the catalogue, and, in BWV3, has become BWV 4.2.In the meantime, the New Bach Edition (Neue Bach-Ausgabe, abbreviated as NBA) was being published, offering a new system to refer to Bach's works, e.g.