A long-awaited event will come in 2017: the Inventaire des manuscrits philosophiques clandestins will be put online. The first stage involves the corpus kept at the Bibliothèque Mazarine. This article describes the history of the huge scientific investigation carried out by an international team, sets out the principles and methodology used to design each inventory record, analyzes the various headings that compose it, and provides a guide for using it.
