The “CapData Opéra” project, initiated by ROF (Réunion des Opéras de France – French Opera Association) and supported by the French Ministry of Culture, uses Semantic Web technologies to share cultural data with the public and the artistic community. The aim is to aggregate data produced by various domain actors to make it globally searchable. This highlights previously invisible data, such as the exchange of creative works and performances between opera houses. To achieve this, an ontology has been designed to define a common vocabulary and implement data interoperability objectives. This ontology is aligned with schema.org, and we are working to align additional models. A set of SHACL rules has been created to validate the data before publication. A dedicated tool, Rodolf, has been developed to monitor the RDF publishing process. This tool is used to execute the process and track which sources have been uploaded to the SPARQL endpoint, including upload times and any errors encountered. Exporting RDF data can be challenging for institutions unfamiliar with Semantic Web technologies, so a dedicated Software Development Kit (SDK) has been developed to assist web developers in exporting CapData RDF data even if they lack experience in this area. In this presentation, we aim to share with the SWIB community the objectives and solutions we have found to federate heterogeneous data. We will present feedback on this project, focusing on technical and management aspects, and then describe the results we have achieved and the future of this project.