This document discusses FRBR (Functional Requirements for Bibliographic Records) and how it relates to RDA (Resource Description and Access). It begins by outlining the goals of understanding the FRBR model of relationships between bibliographic entities and how RDA uses FRBR as the basis for new cataloging rules. It then explains the FRBR model which organizes creative works, expressions, manifestations and items into groups and describes their relationships. It contrasts FRBR with traditional cataloging models and discusses how RDA updates some AACR2 rules to better align with FRBR.