The Coordination of Bibliographic Services (Cobib/Ibict) has modernized its systems, including the National Collective Catalog of Serial Publications (CCN), in the initiative called Pinakes, with the aim of updating the data generated over decades. This work aims to present the correspondence between the entities of the IFLA Library Reference Model (IFLA LRM) and the classes of the Pinakes domain. From the IFLA LRM diagram, the main entities were identified and defined, mapping them to specific classes of the Pinakes Model, categorized and numbered. The relationships and their cardinalities were established, highlighting the importance of inverse properties for the organization of the data. This mapping provides a robust initial framework for the Pinakes Model, which is essential for the organization and retrieval of bibliographic information. In addition, this work lays a solid foundation for future expansions and refinements of the model, facilitating the development of a comprehensive ontology for the Pinakes catalog.