The document discusses Resource Description and Access (RDA), a new cataloging standard that aims to improve findability, identification, and interoperability of library resources. RDA is based on FRBR (Functional Requirements for Bibliographic Records) and FRAD (Functional Requirements for Authority Data) models. It defines cataloging entities and relationships using Semantic Web technologies like URIs, RDF, and SKOS to make metadata more reusable and linkable on the global scale. The document outlines how RDA entities, elements, and vocabularies are being registered in the NSDL Metadata Registry to enable their representation and sharing using Semantic Web formats.