RNgog blo ldan shes rab's Topical Outline of the Ratnagotravibhāga Discovered at Khara Khoto
2) Rngog lo seems to have used the term bsdus don (or its equivalents) to refer to two kinds of works, namely “topical outline” and “essential meaning,” for he composed two works on the RGV―a brief topical outline and a lengthy essential meaning―which bear titles containing the term bsdus don and its equivalent don bsdus pa, respectively. Among Rngog lo’s available writings, our Khara Khoto manuscript and the Byang chub sems dpa’i spyod pa la ’jug pa’i don bsdus pa offer the only testimony that bsdus don (and its equivalent don bsdus pa) refers to a “topical outline,” as he often uses the term bsdus don to indicate a lengthy "essential meaning" in his other commentarial works. The first usage was common among Tibetan masters during the early and middle phyi dar period, whereas the latter was generally rare. This rare usage is most likely influenced by the piṇḍārtha sub-genre of Indian commentaries.
3) Our manuscript has some serious textual problems, such as missing words, illegible words, syntactic ambiguity, and a missing folio. However, we can solve many of those problems by referring to corresponding sentences in the other two works on the RGV, namely, Rngog lo’s Essential Meaning and Phywa pa’s Topical Outline.
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