• First part “Autori e testi, Vita musicale”: Autori e Testi, Vita musicale, Storia della musicologia e metodologie di ricerca. (Authors and texts, Musical life: History of musicology and research methods).
• Second part “Liturgia”: Istituzioni e storia della liturgia, Monodia liturgica, Polifonia liturgica. (Liturgy: Institutions and history of liturgy, Liturgical monody, Liturgical polyphony).
• Third part “Tradizione, Generi, Teoria, Prassi, Discipline e forme d’arte”: Storia e ricezione dei testi, Filologia e ecdotica, Semiografia, Generi e forme, Teoria e analisi, Prassi esecutiva, organologia e iconografia, Altre discipline e forme d’arte. (Traditions, Genres, Theory, Praxis, Disciplines and art forms: The history and reception of texts, Philology and ecdotics, Semiography, Genres and forms, Theory and analysis, Performance praxis, organology and iconography, other disciplines and art forms).
• Fourth part “Opere di consultazione”: Bibliografie, Cataloghi di manoscritti e di opere a stampa, Discografie, Dizionari, Elaborazione elettronica dei dati, Manuali, Repertori ed enciclopedie. (Reference works: Bibliographies, Catalogues of manuscripts and printed works, Discographies, Dictionaries, Data processing, Manuals, Repertories and encyclopedias).
• Fifth part “Congressi e miscellanee”: Congressi e manifestazioni, Miscellanee, Raccolte di lavori personali, Studi in onore. (Congresses and miscellanea: Congresses and events, Miscellanea, Collections of personal work, Studies in honorem).
• Sixth part “Discografia”: Autori e testi, Monodia sacra, Monodia profana, Polifonia sacra, Polifonia profana, Musica strumentale, Musica di tradizione orale, Miscellanee. (Discography: Authors and texts, Religious monody, Religious polyphony, Secular polyphony, Instrumental music, Music of the oral tradition, Miscellanea).
• Indices: Index of manuscripts; Geographical index; Index of names and of notable things; Index of scholars; Index of compositions indicated in the discography; Index of musical ensembles, conductors and performers.