El Colegio de México — Biblioteca Daniel Cosío Villegas

The Biblioteca Daniel Cosío Villegas at El Colegio de México uses AtoM in its special-collections description and metadata work. Its 2025 professional-practice and social-service programme trains participants in ISAD(G), ISAAR(CPF), ISDF and ISDIAH and requires them to create consistent hierarchical descriptions in AtoM. The programme also identifies concrete collection projects: metadata for the Plutarco Elías Calles archive was to be transformed into an AtoM import template, while work on the CICOC collection referred to archival records already present in the AtoM system. This proves active institutional use and continuing import preparation, but not the date of initial deployment, a fully public catalogue or migration from a named legacy platform. The case is therefore bounded to the documented 2025 activity.