Eulalie is an operational, open-source, and free information system dedicated to electroacoustic music for the documentation and conservation of works. It is based on the Doremus ontology. We propose an adaptation of this ontology to the specific field of electroacoustic music and its implementation in a database (Heurist, in dialogue with Nakala to host the documents). The project was born in the context of Art Zoyd Studios, a center for musical creation. One of the missions is to preserve the repertoire of the XXth and XXIst century pieces involving electronics. The principles of interoperability and Open Data have guided the different choices made throughout the project. Thus, it is not only possible to make the content of the Art Zoyd Studios information database interact with other resources on music, but the system itself, Eulalie, can be used by other institutions facing problems similar to those of Art Zoyd Studios.