Kangyur
The Kangyur is divided into sections on Vinaya, Perfection of Wisdom Sutras, Avatamsaka, Ratnakuta and other sutras (75% Mahayana, 25% Nikaya / Agama or Hinayana), and tantras. When exactly the term Kangyur was first used is not known. Collections of canonical Buddhist texts already existed in the time of Trisong Detsen, the sixth king of Tibet.
The exact number of texts in the Kangyur is not fixed. Each editor takes responsibility for removing texts he considers spurious or adding new translations. Currently there are about 12 available Kangyurs. These include the Derge, Lhasa, Narthang, Cone, Peking, Urga, Phudrak and Stog Palace versions, each named after the physical location of its printing (or copying in the case of manuscripts editions). In addition, some canonical texts have been found in Tabo and Dunhuang which provide earlier exemplars to texts found in the Kangyur. The majority of extant Kangyur editions appear to stem from the so-called Old Narthang Kangyur, though the Phukdrak and Tawang editions are thought to lie outside of that textual lineage. The stemma of the Kangyur have been well researched in particular by Helmut Eimer and Paul Harrison.
Read more about this topic: Tibetan Buddhist Canon