The CA–O–RD project (Contemporary Architecture – Open Research Data), developed at the Archives de la construction moderne (EPFL), is part of a broader transformation of archival practices driven by the growing arrival of digital and hybrid collections in the field of architecture. In response to these changes, traditional descriptive tools are no longer sufficient, making it necessary to articulate archival description, digital preservation, and data access within a coherent infrastructure. This presentation, conceived as a perspective for researchers in architectural and heritage history in French-speaking Switzerland, retraces the evolution of archival information systems at the ACM, from early databases to the adoption of Morphé (AtoM), based on international archival standards, and their subsequent extension to digital preservation issues through the integration of Archivematica. It highlights the specific challenges associated with digital architectural archives—diversity of formats, technological dependencies, and obsolescence—and the responses developed through the implementation of an infrastructure compliant with the OAIS model. Beyond technical aspects, the project emphasizes the importance of digital infrastructures and preservation strategies in the management of contemporary archives. By articulating description, preservation, and access, it aims to ensure the long-term integrity, readability, and traceability of data, while stabilizing access conditions and supporting scholarly uses.