Siddhānta (सिद्धान्त) is a Sanskrit term denoting the established and accepted view of any particular school within Indian philosophy; literally "settled opinion or doctrine, dogma, axiom, received or admitted truth; any fixed or established or canonical text-book on any subject" (from siddha, adj. mfn.- accomplished, fulfilled; that has attained the highest object, thoroughly skilled or versed in). This term is an established term within Hindu philosophy which denotes a specific line of development within a Hindu religious or philosophical tradition. The traditional schools of Hindu philosophy have had their siddhạntas established by their respective founders in the form of sūtras (aphorisms). The sūtras are commented by a major philosopher in the respective traditions to elaborate upon the established doctrine by quoting from the śāstras (scriptures) and using logic and pramāṇas (accepted source of knowledge). For example, in the tradition of Vedanta, the author of the Brahma Sūtra was Veda-Vyāsa and the commentators were Ādi Śaṅkara, Rāmānuja and Mādhavācārya (each of whom eventually set up sub-schools within Vedānta). Also, in the tradition of Pūrva Mīmāṁsā, the author of the sūtra was Jaimini and the commentator was Śabarasvāmi. Siddhānta (Tibetan: grub mtha') is a genre of Buddhist literature, which is quite common in Tibetan Buddhism. This genre has its antecedents in Pali suttas such as the Tevijja sutta and the Brahmajala sutta. These early Buddhist sources discuss the various worldviews of brahmins, sramanas and ascetics during the Buddha's time. Buddhist scholastic literature later expanded the discussion to numerous other Buddhist and non-Buddhist views. Indian works which discuss various competing doctrines include the Kathavatthu, the Mahavibhasa, Bhaviveka's Blaze of Reasoning and Shantaraksita's Tattvasamgraha. Tibetan Buddhists developed the genre further and numerous siddhānta works were written by figures such as Rongzompa, Chekawa Yeshe Dorje, Sakya Pandita, Longchenpa, Jamyang Shéba, and Changkya Rölpé Dorjé.