¿Se inicia la transición?: Adiós a Marbi, bienvenido MAC

The advancing Bibliographic Framework Initiative (BIBFRAME) is described, emphasizing that with the publication of the minutes of the MARBI Midsummer meeting on 2013 this committee was officially dissolved. MARBI has been operative for 30 years. It is noteworthy that at the same meeting the MARC Advisory Committee (MAC) was created with the aim of continuing the maintenance of the MARC 21 format, but also fostering the development of BIBFRAME, as MARBI had done so far. This factre presents a hiatus in cataloguing. Resource: Description and Access has already entered into production, as well as the development of Europeana Data Model and its adoption by various international projects, most notably the Digital Public Library of America. Finally, we examine whether these important processes are objectively having any impact on the Spanish libraries.