Mahīshāsaka school ［化地部・弥沙塞部］ (; Keji-bu or Mishasoku-bu): An offshoot of the Sarvāstivāda school and one of the so-called twenty Hinayana schools. According to The Doctrines of the Different Schools, the Mahīshāsaka school was formed out of the Sarvāstivāda school in the third one-hundred-year period after Shakyamuni Buddha’s death. Other offshoots of the Sarvāstivāda school were the Vātsīputrīya, Kāshyapīya, and Sautrāntika schools. The Mahīshāsaka school acknowledged the reality of the present, but denied the reality of past and future, though its parent, the Sarvāstivāda school, recognized the reality of past, present, and future. The Fivefold Rules of Discipline is the vinaya text, or the text of monastic rules, of the Mahīshāsaka school. The Dharmagupta school eventually branched off from the Mahīshāsaka school.