This paper describes AACR2, FRBR and RDA and their relationship and impact on cataloging guidelines. Beginning with a background of AACR2 and its shortcomings, the paper then examines RDA as the proposed revision to be published in 2009. How RDA improves on AACR2, its purpose, the progress made since 2005, and the advantages and disadvantages are highlighted. The impact of FRBR on cataloging and RDA is included.