Nelug Dzö () is a poetic vignette written in Classical Tibetan and one of the Seven Treasuries of Longchenpa. Longchenpa wrote Desum Nyingpo (Wylie: sde gsum snying po), a prose autocommentary to this work. Keith Dowman considers it a "magical psychotropic poem".
Sanskrit title in IAST: TathÃÂtva-ratna-koá¹£a-nÃÂma.
Importantly, the Tibetan Wylie "gnas lugs" is the analogue of the Sanskrit IAST "tathÃÂtva". The online dictionary of the Tibetan and Himalayan Library identifies "tathÃÂtva" (literally, "thusness") as synonymous with tathatÃÂ and dharmatÃÂ.
Rigpa Shedra provides an English text outline following the translation by Barron, from whom the Tibetan was sourced, as follows:
The majority of quotations cited by Longchenpa in the Desum Nyingpo are drawn from the tantras of the Nyingma Gyubum () ('Collected Tantras of the Ancients'). Out of the Nyingma Gyubum the most quoted tantra in the Desum Nyingpo is the Kunjed Gyalpo (), the principal tantra of Semde (), the 'mind series' of Dzogchen. Sixteen of the Seventeen Tantras of the Upadesha-varga are quoted at least once in the Desum Nyingpo and the most cited is the principal tantra of this class, the Drataljur or Reverberation of Sound ().
In 1998, Richard Barron rendered the text into English with his translation of the Nelug Dzö in free verse with the Tibetan verse on the facing page along with its prose autocommentary by Longchenpa, the Desum Nyingpo, with both works within the one bound volume. The numerous embedded quotations from the Seventeen Tantras were referenced and checked by Barron against the edition printed at Adzom Chögar in eastern Tibet. Keith Dowman has also translated the text.