In the 2003, the Diffusion Service of the Intellectual Creation was created (SEDICI) as an Institutional Repository (IR) of the National University of La Plata (UNLP) supported by the development of an own software called Celsius DL. At the end of 2011 a study to migrate to another more actualize software was done and DSpace was selected, the most used software platform of IR in the world. The process of migration from Celsius DL to DSpace finished in 2012. DSpace allowed new functionalities, flexibility in the strategic changes by the repository managers, and some modifications in the institutional image without affecting the logic of the repository and widen the management of the typologies of the accepted resources. DSpace, as other platforms, has some limitations in relation to the Representation of the Resources, which consists on the process of registering in a persisting way a set of data as a synthesis and substitution of the “real” object to identify it, recover it and distribute it, such a situation was one of the main problems presented in the transition of Celsius DL to DSpace. This research focused on describing the Representation of Resources problem in the SEDICI Institutional Repository and showing a possible solution, all under a Model- Driven approach. The study object – The Representation of Resources- is a recurrent problem that has been studied for some authors in other parts of the world: Malizia (2010), Paganelli (2005), Gonçalves (2004), Fox (2004), Candela (2007), among others. However, the analyzed papers address the topic in a general way, they don´t take into consideration the resource as a core idea. The development of a referential framework that allows the improvement of functionalities from the design of a flexible model according to the representation of resources was suggested, under the context of SEDICI, but re-used in other repositories. Such proposal is related to the elements of a repository: resources, metadata schemes, storage and cataloging, and with the following functional processes according to the storage material and the ISO norm 14721: ingest, storage, cataloging, indexing, search engine, and browsing. To achieve it, a bibliographic analysis of the topic was done, the pattern of construction of the software Model-Driven was selected to implement the solution, and different conceptual models and models of data were analyzed to build a referential framework that supports the proposed model associated to the ISO norm 14721. The pattern of Model- Driven Development (MDD) is a construction of software approach that assigns a central role to the models with prototypes that go from the most abstract ones to the most concrete ones. This pattern, besides, provides an environment that allows the interested persons to share their points of view and manipulate the representation of the domain entities. That is why in the research proposal, the referential framework was organized in 5 modules or phases starting from the Model- Driven approach: DSL to the development of the flexible model, transformation of the flexible model to a relational prototype, transformation of the relational model to a script SQL to the creation of a data base, mapping the DSpace-SEDICI resources to the created data base, and the development of an application in WebRatio to the visualization and exportation of the resources. This research gave response to the considered objective and tied premises from tree disciplines: The information sciences, documental sciences and computer sciences. To braid together such areas in a proposal related to institutional repositories represented a contribution in an area with lacks of literature.