The Cataloging and Metadata is sponsoring three sessions at the Meeting of the Music Library Association and the Theatre Library Association next week: RDA Changes in Theory and Practice – Thursday, March 2, 1:30 p.m.-2:20 p.m. CSTIn this session presenters will address changes in the new RDA Toolkit from a theoretical perspective as well as in terms of practical, on-the-ground cataloging. The current official text of RDA incorporates numerous changes, many of which were necessary to accommodate the IFLA Library Reference Model (LRM). The LRM revises, reconciles, and adds to the Functional Requirements family of models (FRBR, FRAD, and FRSAD) that formed the basis of the original RDA text. Among the wholly new concepts introduced in the LRM are representative expression elements (a recognition of the fact that most users see many expression properties of the “original” expression of a work to be properties of the work instead) and a