The Ratnagotravibhāga (Sanskrit, abbreviated as RGV, meaning: Analysis of the Jeweled Lineage, Investigating the Jewel Disposition) and its vyākhyā commentary (abbreviated RGVV to refer to the RGV verses along with the embedded commentary), is an influential Mahāyāna Buddhist treatise on buddha-nature (a.k.a. tathāgatagarbha). The text is also known as the Mahāyānottaratantraśāstra (The Ultimate Teaching of the Mahāyāna). The RGVV was originally composed in Sanskrit, likely between the middle of the third century and no later than 433 CE. The text and its commentary are also preserved in Tibetan and Chinese translations. The Ratnagotra focuses on the buddha nature present in all sentient beings, which is eternal, blissful, unconditioned and originally pure. This buddha nature is obscured by defilements, but when they are removed, the buddha nature is termed dharmakaya, the ultimate Buddha body. The buddha nature is what is referred to as the "jewel disposition" or "jeweled lineage" (ratnagotra) of the Buddhas. The RGVV often quotes from various tathāgatagarbha sutras and comments on them. The Ratnagotravibhāga is an important and influential text in Tibetan Buddhism and was also important for the Huayan school. The authorship is of the text is uncertain. The Tibetan tradition (as well as the later Indian sources) state that it was taught by the bodhisattva Maitreya and transmitted via Asanga, while earlier Chinese sources state it was written by a certain Indian named Jianyi (賢慧, Sanskrit reconstruction: *Sāramati or *Sthiramati). Modern scholarship favors the Chinese attribution. Titles Ratnagotravibhāga The Sanskrit gotra is a figurative term for family or lineage, while ratna means jewel or precious stone. In Yogacara Buddhism, gotra has the meaning of certain "dispositions" or "innate potential for spiritual achievement" that sentient beings have and which place them in five "families" corresponding to the three vehicles, undefined and icchantikas (deluded hedonists). The Ratnagotravibhāga focuses on the family lineage and inner disposition (gotra) which allows all beings to become Buddhas, and thus is compared to a precious jewel (ratna). This is the unchanging buddha-nature that is present in all beings. Uttaratantraśāstra A secondary title for this work is Uttaratantraśāstra (The Treatise on the Ultimate Teaching) or Mahāyānottaratantraśāstra (The Treatise on the Ultimate Teaching of the Mahāyāna), indicating how it considers itself to be the highest and ultimate teaching of Mahayana Buddhism. This title has also been translated as Treatise on the Supreme Continuum. Tantra can mean both "doctrine" or "teaching" as well as "continuum". The