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The Vinaya (a word in Pāli as well as in Sanskrit, with literal meaning 'leading out', 'education', 'discipline') is the regulatory framework for the Buddhist monastic community, or sangha, based on the canonical texts called Vinaya Pitaka. The teachings of the Buddha, or Buddhadharma can be divided into two broad categories: 'Dharma' or doctrine, and 'Vinaya', or discipline. Another term for Buddhism is dharmavinaya.
At the heart of the Vinaya is a set of rules known as Patimokkha (Pāli), or Pratimoksha (Sanskrit). The Vinaya was orally passed down from the Buddha to his disciples. Eventually, numerous different Vinayas arose in Buddhism, based upon geographical or cultural differences and the different Buddhist schools that developed. Three of these are still in use. The Vinayas are the same in substance and have only minor differences.
The Prātimokṣa is traditionally a section of the Vinaya. The Theravada Vinaya is preserved in the Pali Canon, in the Vinaya Piṭaka section. The Mūlasarvāstivāda Vinaya is preserved in both the Tibetan Buddhist canon in the Kangyur, in a Chinese edition, and in an incomplete Sanskrit manuscript. Some other complete vinaya texts are preserved in the Chinese Buddhist canon (see: Taishō Tripiṭaka), and these include:
- Mahīśāsaka Vinaya (T. 1421)
- Mahāsāṃghika Vinaya (T. 1425)
- Dharmaguptaka Vinaya (T. 1428)
- Sarvāstivāda Vinaya (T. 1435)
- Mūlasarvāstivāda Vinaya (T. 1442)
East Asian Buddhism 
Buddhists in China, Korea, Taiwan and Vietnam follow the Dharmaguptaka Vinaya (四分律), which has 250 rules for the bhikkhus and 348 rules for the bhikkhunis. Some schools in Japan technically follows this, but many monks there are married, which can be considered a violation of the rules. Other Japanese monks follow the Bodhisattva Precepts only.
Tibetan Buddhism 
Buddhists in Tibet and Mongolia follow the Mūlasarvāstivāda Vinaya, which has 253 rules for the bhikshus and 364 rules for bhikshunis. (While the Dalai Lama has authorized followers of the Tibetan tradition to be ordained as nuns the issue remains theoretical as the female order has never been introduced in Tibet.) In addition to these patimokkha rules there are many supplementary rules.
The Buddha constantly reminds his hearers that it is the spirit of the rules that counts. On the other hand, the rules themselves are designed to assure a satisfying life, and provide a perfect springboard for the higher attainments. Monastics are instructed by the Buddha to live as "islands unto themselves". In this sense, living life as the vinaya prescribes it is, as one scholar puts it: "more than merely a means to an end: it is very nearly the end in itself."
Surrounding the rules is a range of texts. Some of these explain the origins of the rules - it is possible to trace the development of the rules from responses to specific situations or actions to a general codification. There are also a number of sutta-like texts that are more general statements about Buddhist doctrine, or that give biographical details of some of the great disciples and their enlightenment. Other sections detail how the rules are to be applied, how breaches are to be dealt with, and how disputes amongst the monks are handled.
It is thought that originally there were no rules and the Buddha and his disciples just lived in harmony when they were together. Most of the time they would have been wandering alone, but every year, during the monsoon season when travelling became impossible, the bhikkhus would come together for a few months. As the sangha became bigger and started accepting people of lesser ability who remained unenlightened, it became necessary to begin having rules.
It seems that initially these were quite flexible and were adapted to the situation. By the time of the Buddha's death there would have been a body of rules bhikkhus were expected to follow. In the Mahaparinibbana Sutta the Buddha, as part of his last teaching, tells the bhikkhus that they can abandon some minor rules, but that they should stick to the major ones, but there appears to have been some confusion over which was which. It was therefore decided that they would keep all of the rules. Immediately after the Buddha's death there was a council, at which all of the teachings were recited, collected, and sorted. Legend has it that the huge volume of teachings was recited from memory, with Ananda reciting the dhamma and Upali reciting the Vinaya.
- Keown, Damien. Dictionary of Buddhism. 2003. p. 220
- 四分律 http://www.cbeta.org/result/T22/T22n1428.htm
- 解脫戒經 http://www.cbeta.org/result/normal/T24/1460_001.htm
- 《四分律比丘戒本》 http://www.cbeta.org/result/normal/T22/1429_001.htm
- 《摩訶僧祇比丘尼戒本》 http://www.cbeta.org/result/normal/T22/1427_001.htm
- Richard Gombrich, Theravada Buddhism: A Social History from Ancient Benares to Modern Colombo. Routledge and Kegan Paul, 1988, page 89. He is quoting Carrithers.
See also 
- First Buddhist Council
- Second Buddhist Council
- Early Buddhist Schools
- Schools of Buddhism
- Sects & Sectarianism - The origins of Buddhist Schools
- Translations and extensive commentary on Theravada Vinaya (Vinaya section on www.accesstoinsight.org)
- WikiVinaya Project
- "Vinaya Texts (Part 1)," by T.W. Rhys Davids & Hermann Oldenberg (trans.) (), originally published by Clarendon Press (Oxford).