Mahayana is an inclusive faith characterized by the adoption of new texts, in addition to the traditional Sūtra Piṭaka of the Early Buddhist schools, and a shift in the understanding of Buddhism.
The sutra's teachings purport to be of a higher order than those contained in the āgamas of the Sūtra Piṭaka, and that humanity had been unable to understand the sutra at the time of the Buddha, and thus the teaching had to be held back.
The second category is the Sutta Pitaka (literally "basket of threads", or of "the well spoken"; Sanskrit: Sutra Pitaka, following the former meaning) which consists primarily of accounts of the Buddha's teachings.
Kama Sutra | Vinaya Pitaka | Kama Sutra Records | Kama Sutra: A Tale of Love | Abhidhamma Pitaka | Sutta Pitaka | Sutra Pitaka | Lotus Sutra | Sūtra Piṭaka | Sutra of Forty-two Chapters | Sutra | sutra | Platform Sutra | Kṣitigarbha Bodhisattva Pūrvapraṇidhāna Sūtra | Aurora Sutra | Amitabha Sutra | Tattvartha Sutra | Sutra of the Wise and the Fool | Sthananga Sutra | Sandhinirmocana Sutra | Platform Sūtra | Lotus Sūtra | lotus sutra | Eleven-Faced Avalokitesvara Heart Dharani Sutra |