The Pramāṇa-samuccaya (Compendium of Epistemology) is a Buddhist philosophical treatise focusing on epistemology (pramana) by Dignāga, an Indian Buddhist logician and epistemologist who lived from c. 480 to c. 540 CE.
[1] The Pramāṇa-samuccaya exists in two Tibetan translations by Vasudhararaksita and Kanakavarman respectively.
The original Sanskrit was initially thought to be lost by modern scholars, but then a manuscript of the commentary by Jinendrabuddhi was discovered.
Modern scholars working with The China Tibetology Research Center and the Austrian Academy of Sciences are currently working to extract and reconstruct the Sanskrit root text of the Pramāṇasamuccaya from the commentary in which it is embedded.
[2]