Berliner Anweisungen

The Berliner Anweisungen or BA, short for Anweisung für den alphabetischen Katalog der Volksbüchereien were a set of bibliographical cataloging rules for public libraries in Germany.
They were developed from 1938 to 1942, built on the much more complicated Preußische Instruktionen created for scientific libraries in 1899 and expanded by DIN 1505 in 1932.
Since 1976/1977, public libraries in Germany-speaking countries work with the Regeln für die alphabetische Katalogisierung set of rules,
which were based on the Paris Principles introduced in 1961 and the International Standard Bibliographic Description as of 1971. RAK in turn is in the process of being superseded by the adoption of Resource Description and Access since 2015.