Abstract

In 2016, the first Spanish libraries will begin using RDA cataloging rules (Resource Description and Access), replacing AACR2. This note article explains that RDA should be viewed as a confluence of three trends: savings, sharing, and developing technology. The objectives of the catalogs (to find a known work, to find works by the same author or subject, and to provide relationships between authors or entities) are explained. A brief historical review of AACR, MARC format, ISBD, FRBR, and Bibframe, is made, finally, to explain the RDA rules.