Schlagwortnormdatei

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The Schlagwortnormdatei or SWD (translated as Subject Headings Authority File) is a controlled vocabulary index term system used primarily for subject indexing in library catalogs. The SWD is managed by the German National Library (DNB) in cooperation with various library networks. The inclusion of keywords in the SWD is defined by Regeln für die Schlagwortkatalogisierung (RSWK) (English: Rules for the keyword catalogue). Similar authority systems in other languages include the Library of Congress Subject Headings (LCSH) and the Répertoire d’autorité-matière encyclopédique et alphabétique unifié (RAMEAU [d]). Since April 2012 the SWD is part of the Gemeinsame Normdatei (GND) (English: Integrated Authority File).