The main objective of this paper is to present arguments for and recommendations to representing UNIMARC formats for bibliographic and authority data in RDF (Resource Description Framework), the W3C standard for structuring data in Semantic Web and Linked Data environment. This is a continuation of the work already started by IFLA’s respective groups in representing International Standard Bibliographic Description, and conceptual models Functional Requirements for Bibliographic Records, Functional Requirements for Authority Data and Functional Requirements for Subject Authority Data. The authors highly recommend that the Permanent UNIMARC Committee propose to IFLA the funding of the development of UNIMARC representation in RDF as a research and development project.