So far, Usuarium was limited to those Uses of the Latin West that fit into the structure of the Roman Rite. With the processing of the printed Ambrosian Missal of 1499, the Rite of the ancient Metropolitan See of Milan also became available. The full text of the entire book can be analyzed and compared to the various Roman parallels, only the biblical lessons with standard wording have been abbreviated to their opening and closing phrases. In the 'Genre' field of the 'Research' menu (Filter), you can select the specific Ambrosian genres of e.g. Ingressa, Super populum, V. in Alleluia, Post evangelium, Super sindonem, Offerenda, Super oblatam, or Confractorium. Other genres that are analogous with their Roman equivalents like Prophecies, Epistles, Gospels, or Prefaces can be surveyed according to the usual nomenclature.