初期仏教
Early Buddhism in India is generally divided into various monastic fraternities, or nikāyas. Conventionally numbering eighteen, the actual count varied over time. The doctrinal orientation of each school differed somewhat, as did the number of piṭakas in their canon. An example of this is the Dharmaguptaka, which included a Bodhisattva Piṭaka and a Dhāraṇī Piṭaka.