This document summarizes a webinar on new concepts in RDA, focusing on representative expressions and manifestation statements. It discusses how the new RDA is based on the IFLA Library Reference Model (LRM) which defines four bibliographic entities - work, expression, manifestation, and item. It provides examples of how these entities can be described using RDF triples. The document then compares attributes of works and expressions between the current and new RDA, noting changes and clarifying appropriate uses of attributes for each entity. Finally, it acknowledges that while catalogers want to record certain expression-level details in work records, the current RDA structure does not allow this.