Detailed description of the data model of the research project on the Ballets Espagnols de Antonia Mercé La Argentina, a dance company active between 1927 and 1929 that adapted the model of Diaghilev's Ballets Russes to a repertoire based on the construction of a national identity through the modern and avant-garde aesthetics of interwar Europe. The systematisation of the preserved sources and their visualisation in interactive maps permits research to be carried out on one of the most brilliant episodes in the history of Spanish dance and to collaborate in the recovery of a forgotten dance heritage. Data systematisation involved designing a model containing the classes, possible relationships and properties of our information, with the extensive collection extracted from diverse sources, from national and international institutions, constituting the support for future consultations, studies, spatiotemporal analyses and visualisations that help us to understand the contributions of the repertoire and the performances of "Los Ballets Espagnols and the individual recitals of Antonia Mercé, la Argentina", and its impact on the history of Spanish and international dance. The data modelling of our project has been carried out according to the UML (Unified Modelling Language) standard. Being an internationally used language, it enables our work to be understandable, scalable and reusable by any other researcher working on a related topic. The class diagram that describes our universe of discourse, within the framework of this art and dance history project, takes into account the georeferenced nature of the data and has been implemented in a database through an Entity-Relationship model using a free software management system, PostgreSQL and the PostGIS spatial extension.

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