structural:summarization, information:extraction, quality:corruption
Liturgical reform

Maintaining continuity with his predecessors, John XXIII continued the gradual reform of the Roman liturgy, and published changes that resulted in the 1962 Roman Missal, the last typical edition containing the Tridentine Mass codified in 1570 by Pope Pius V after the Council of Trent. It inserted into the canon of the Mass the name of Saint Joseph, the first change for centuries in the canon of the Mass. Many traditionalist Catholics, today, continue to use the 1962 Roman Missal, to celebrate Mass.